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• Routing audio to Bluetooth Headset (non-A2DP) on Android

  - by Jayesh

  I have a non-A2DP single ear BT headset (Plantronics 510) and would like to use it with my Android HTC Magic to listen to low quality audio like podcasts/audio books. After much googling I found that only phone call audio can be routed to the non-A2DP BT headsets. (I would like to know if you have found a ready solution to route all kinds of audio to non-A2DP BT headsets) So I figured, somehow programmatically I can channel the audio to the stream that carries phone call audio. This way I will fool the phone to carry my mp3 audio to my BT headset. I wrote following simple code. import android.content.*; import android.app.Activity; import android.os.Bundle; import android.media.*; import java.io.*; import android.util.Log; public class BTAudioActivity extends Activity { private static final String TAG = "BTAudioActivity"; private MediaPlayer mPlayer = null; private AudioManager amanager = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); amanager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); amanager.setBluetoothScoOn(true); amanager.setMode(AudioManager.MODE_IN_CALL); mPlayer = new MediaPlayer(); try { mPlayer.setDataSource(new FileInputStream( "/sdcard/sample.mp3").getFD()); mPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL); mPlayer.prepare(); mPlayer.start(); } catch(Exception e) { Log.e(TAG, e.toString()); } } @Override public void onDestroy() { mPlayer.stop(); amanager.setMode(AudioManager.MODE_NORMAL); amanager.setBluetoothScoOn(false); super.onDestroy(); } } As you can see I tried combinations of various methods that I thought will fool the phone to believe my audio is a phone call: Using MediaPlayer's setAudioStreamType(STREAM_VOICE_CALL) using AudioManager's setBluetoothScoOn(true) using AudioManager's setMode(MODE_IN_CALL) But none of the above worked. If I remove the AudioManager calls in the above code, the audio plays from speaker and if I replace them as shown above then the audio stops coming from speakers, but it doesn't come through the BT headset. So this might be a partial success. I have checked that the BT headset works alright with phone calls. There must be a reason for Android not supporting this. But I can't let go of the feeling that it is not possible to programmatically reroute the audio. Any ideas? P.S. above code needs following permission <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>

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• WCF: Using Streaming and Username/Password authentication at the same time

  - by Kay

  Hi, I have a WCF Service with the following requirements: a) The client requests a file from the server which is transferred as a Stream. Files may be 100MB or larger. I need streaming or chucking or whatever to make sure that IIS is not loading the whole package into memory before starting to send it. b) The client will transfer an ID to identify the file to be downloaded. The user should be authenticated by providing username/password. c) While the username/password part of the communication needs to be encrypted, encryption of the downloaded file is optional for our use case. My other services, where I am returning smaller files, I am using the following binding: <ws2007HttpBinding> <binding name="ws2007HttpExtern" maxReceivedMessageSize="65536000"> <security mode="Message"> <message clientCredentialType="UserName" /> </security> </binding> </ws2007HttpBinding> But, as I said, that is no good for streaming (Message encryption needs the complete message to encrypt and that is not the case when streaming). So, I asked Microsoft support and I got more or less the following proposal: <bindings> <basicHttpBinding> <binding name="basicStreaming" messageEncoding="Mtom" transferMode="StreamedResponse"> <security mode="Transport"> <transport clientCredentialType="Basic" /> </security> </binding> </bindings> <services> <service behaviorConfiguration="MyProject.WCFInterface.DownloadBehavior" name="MyProject.WCFInterface.DownloadFile"> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="basicStreaming" contract="MyProject.WCFInterface.IDownloadFile" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> <behaviors> <serviceBehaviors> <behavior name="MyProject.WCFInterface.DownloadBehavior"> <serviceMetadata httpGetEnabled="false" httpsGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> </behaviors> When I use this, I get the following error message: Could not find a base address that matches scheme https for the endpoint with binding BasicHttpBinding. Registered base address schemes are [http]. I am using the Web Development Server so far (for production IIS7). I have two questions. a) How would you configure WCF to achieve the goal? b) If the MS proposal is good: What I am doing wrong, the error message does not really help me. Thanks.

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• Build problems when adding `__str__` method to Boost Python C++ class

  - by Rickard

  I have started to play around with boost python a bit and ran into a problem. I tried to expose a C++ class to python which posed no problems. But I can't seem to manage to implement the __str__ functionality for the class without getting build errors I don't understand. I'm using boost 1_42 prebuild by boostpro. I build the library using cmake and the vs2010 compiler. I have a very simple setup. The header-file (tutorial.h) looks like the following: #include <iostream> namespace TestBoostPython{ class TestClass { private: double m_x; public: TestClass(double x); double Get_x() const; void Set_x(double x); }; std::ostream &operator<<(std::ostream &ostr, const TestClass &ts); }; and the corresponding cpp-file looks like: #include <boost/python.hpp> #include "tutorial.h" using namespace TestBoostPython; TestClass::TestClass(double x) { m_x = x; } double TestClass::Get_x() const { return m_x; } void TestClass::Set_x(double x) { m_x = x; } std::ostream &operator<<(std::ostream &ostr, TestClass &ts) { ostr << ts.Get_x() << "\n"; return ostr; } BOOST_PYTHON_MODULE(testme) { using namespace boost::python; class_<TestClass>("TestClass", init<double>()) .add_property("x", &TestClass::Get_x, &TestClass::Set_x) .def(str(self)) ; } The CMakeLists.txt looks like the following: CMAKE_MINIMUM_REQUIRED(VERSION 2.8) project (testme) FIND_PACKAGE( Boost REQUIRED ) FIND_PACKAGE( Boost COMPONENTS python REQUIRED ) FIND_PACKAGE( PythonLibs REQUIRED ) set(Boost_USE_STATIC_LIBS OFF) set(Boost_USE_MULTITHREAD ON) INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS}) INCLUDE_DIRECTORIES ( ${PYTHON_INCLUDE_PATH} ) add_library(testme SHARED tutorial.cpp) target_link_libraries(testme ${Boost_PYTHON_LIBRARY}) target_link_libraries(testme ${PYTHON_LIBRARY} The build error I get is the following: Compiling... tutorial.cpp C:\Program Files (x86)\boost\boost_1_42\boost/python/def_visitor.hpp(31) : error C2780: 'void boost::python::api::object_operators::visit(ClassT &,const char *,const boost::python::detail::def_helper &) const' : expects 3 arguments - 1 provided with [ U=boost::python::api::object ] C:\Program Files (x86)\boost\boost_1_42\boost/python/object_core.hpp(203) : see declaration of 'boost::python::api::object_operators::visit' with [ U=boost::python::api::object ] C:\Program Files (x86)\boost\boost_1_42\boost/python/def_visitor.hpp(67) : see reference to function template instantiation 'void boost::python::def_visitor_access::visit,classT>(const V &,classT &)' being compiled with [ DerivedVisitor=boost::python::api::object, classT=boost::python::class_, V=boost::python::def_visitor ] C:\Program Files (x86)\boost\boost_1_42\boost/python/class.hpp(225) : see reference to function template instantiation 'void boost::python::def_visitor::visit>(classT &) const' being compiled with [ DerivedVisitor=boost::python::api::object, W=TestBoostPython::TestClass, classT=boost::python::class_ ] .\tutorial.cpp(29) : see reference to function template instantiation 'boost::python::class_ &boost::python::class_::def(const boost::python::def_visitor &)' being compiled with [ W=TestBoostPython::TestClass, U=boost::python::api::object, DerivedVisitor=boost::python::api::object ] Does anyone have any idea on what went wrrong? If I remove the .def(str(self)) part from the wrapper code, everything compiles fine and the class is usable from python. I'd be very greatful for assistance. Thank you, Rickard

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• Java Process "The pipe has been ended" problem

  - by Amit Kumar

  I am using Java Process API to write a class that receives binary input from the network (say via TCP port A), processes it and writes binary output to the network (say via TCP port B). I am using Windows XP. The code looks like this. There are two functions called run() and receive(): run is called once at the start, while receive is called whenever there is a new input received via the network. Run and receive are called from different threads. The run process starts an exe and receives the input and output stream of the exe. Run also starts a new thread to write output from the exe on to the port B. public void run() { try { Process prc = // some exe is `start`ed using ProcessBuilder OutputStream procStdIn = new BufferedOutputStream(prc.getOutputStream()); InputStream procStdOut = new BufferedInputStream(prc.getInputStream()); Thread t = new Thread(new ProcStdOutputToPort(procStdOut)); t.start(); prc.waitFor(); t.join(); procStdIn.close(); procStdOut.close(); } catch (Exception e) { e.printStackTrace(); printError("Error : " + e.getMessage()); } } The receive forwards the received input from the port A to the exe. public void receive(byte[] b) throws Exception { procStdIn.write(b); } class ProcStdOutputToPort implements Runnable { private BufferedInputStream bis; public ProcStdOutputToPort(BufferedInputStream bis) { this.bis = bis; } public void run() { try { int bytesRead; int bufLen = 1024; byte[] buffer = new byte[bufLen]; while ((bytesRead = bis.read(buffer)) != -1) { // write output to the network } } catch (IOException ex) { Logger.getLogger().log(Level.SEVERE, null, ex); } } } The problem is that I am getting the following stack inside receive() and the prc.waitfor() returns immediately afterwards. The line number shows that the stack is while writing to the exe. The pipe has been ended java.io.IOException: The pipe has been ended at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:260) at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65) at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109) at java.io.FilterOutputStream.write(FilterOutputStream.java:80) at xxx.receive(xxx.java:86) Any advice about this will be appreciated.

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• System.AccessViolationException when calling DLL from WCF on IIS.

  - by Wodzu

  Hi guys. I've created just a test WCF service in which I need to call an external DLL. Everything works fine under Visutal Studio development server. However, when I try to use my service on IIS I am getting this error: Exception: System.AccessViolationException Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. The stack trace leeds to the call of DLL which is presented below. After a lot of reading and experimenting I am almost sure that the error is caused by wrong passing strings to the called function. Here is how the wrapper for DLL looks like: using System; using System.Runtime.InteropServices; using System.Text; using System; using System.Security; using System.Security.Permissions; using System.Runtime.InteropServices; namespace cdn_api_wodzu { public class cdn_api_wodzu { [DllImport("cdn_api.dll", CharSet=CharSet.Ansi)] // [SecurityPermission(SecurityAction.Assert, Unrestricted = true)] public static extern int XLLogin([In, Out] XLLoginInfo _lLoginInfo, ref int _lSesjaID); } [Serializable, StructLayout(LayoutKind.Sequential)] public class XLLoginInfo { public int Wersja; public int UtworzWlasnaSesje; public int Winieta; public int TrybWsadowy; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x29)] public string ProgramID; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x15)] public string Baza; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 9)] public string OpeIdent; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 9)] public string OpeHaslo; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 200)] public string PlikLog; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x65)] public string SerwerKlucza; public XLLoginInfo() { } } } this is how I call the DLL function: int ErrorID = 0; int SessionID = 0; XLLoginInfo Login; Login = new XLLoginInfo(); Login.Wersja = 18; Login.UtworzWlasnaSesje = 1; Login.Winieta = -1; Login.TrybWsadowy = 1; Login.ProgramID = "TestProgram"; Login.Baza = "TestBase"; Login.OpeIdent = "TestUser"; Login.OpeHaslo = "TestPassword"; Login.PlikLog = "C:\\LogFile.txt"; Login.SerwerKlucza = "MyServ\\MyInstance"; ErrorID = cdn_api_wodzu.cdn_api_wodzu.XLLogin(Login, ref SessionID); When I comment all the string field assigments the function works - it returns me an error message that the program ID has not been given. But when I try to assign a ProgramID (or any other string fields, or all at once) then I am getting the mentioned exception. I am using VS2008 SP.1, WinXP and IIS 5.1. Maybe the ISS itself is a problem? I've tried all the workarounds that has been described here: http://forums.asp.net/t/675515.aspx Thansk for your time. After edit: Installing Windows 2003 Server and IIS 6.0 solved the problem.

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• Can't view order in magento

  - by koko

  Hi, I've been setting up a fresh magento 1.4.0.1 install, working great so far. I did some test orders just to see. Everything works fine, but when I click on "view order" under "my orders", I get a bunch of error messages: There has been an error processing your request Notice: iconv_substr() [function.iconv-substr]: Unknown error (0) in /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Helper/String.php on line 98 Trace: #0 [internal function]: mageCoreErrorHandler(8, 'iconv_substr() ...', '/data/web/A1423...', 98, Array) #1 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Helper/String.php(98): iconv_substr('1', 0, 50, 'UTF-8') #2 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Helper/String.php(173): Mage_Core_Helper_String-substr('1', 0, 50) #3 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Helper/String.php(112): Mage_Core_Helper_String-str_split('1', 50) #4 /data/web/A14237/htdocs/magento/app/design/frontend/base/default/template/sales/order/items/renderer/default.phtml(58): Mage_Core_Helper_String-splitInjection('1') #5 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(189): include('/data/web/A1423...') #6 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(225): Mage_Core_Block_Template-fetchView('frontend/base/d...') #7 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(242): Mage_Core_Block_Template-renderView() #8 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Core_Block_Template-_toHtml() #9 /data/web/A14237/htdocs/magento/app/code/core/Mage/Sales/Block/Items/Abstract.php(137): Mage_Core_Block_Abstract-toHtml() #10 /data/web/A14237/htdocs/magento/app/design/frontend/base/default/template/sales/order/items.phtml(52): Mage_Sales_Block_Items_Abstract-getItemHtml(Object(Mage_Sales_Model_Order_Item)) #11 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(189): include('/data/web/A1423...') #12 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(225): Mage_Core_Block_Template-fetchView('frontend/base/d...') #13 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(242): Mage_Core_Block_Template-renderView() #14 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Core_Block_Template-_toHtml() #15 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(516): Mage_Core_Block_Abstract-toHtml() #16 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(467): Mage_Core_Block_Abstract-_getChildHtml('order_items', true) #17 /data/web/A14237/htdocs/magento/app/design/frontend/base/default/template/sales/order/view.phtml(64): Mage_Core_Block_Abstract-getChildHtml('order_items') #18 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(189): include('/data/web/A1423...') #19 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(225): Mage_Core_Block_Template-fetchView('frontend/base/d...') #20 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(242): Mage_Core_Block_Template-renderView() #21 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Core_Block_Template-_toHtml() #22 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(516): Mage_Core_Block_Abstract-toHtml() #23 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(463): Mage_Core_Block_Abstract-_getChildHtml('sales.order.vie...', true) #24 /data/web/A14237/htdocs/magento/app/code/core/Mage/Page/Block/Html/Wrapper.php(52): Mage_Core_Block_Abstract-getChildHtml('', true, true) #25 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Page_Block_Html_Wrapper-_toHtml() #26 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract-toHtml() #27 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Core_Block_Text_List-_toHtml() #28 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(516): Mage_Core_Block_Abstract-toHtml() #29 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(467): Mage_Core_Block_Abstract-_getChildHtml('content', true) #30 /data/web/A14237/htdocs/magento/app/design/frontend/base/default/template/page/2columns-left.phtml(48): Mage_Core_Block_Abstract-getChildHtml('content') #31 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(189): include('/data/web/A1423...') #32 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(225): Mage_Core_Block_Template-fetchView('frontend/base/d...') #33 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Template.php(242): Mage_Core_Block_Template-renderView() #34 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Block/Abstract.php(674): Mage_Core_Block_Template-_toHtml() #35 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Model/Layout.php(536): Mage_Core_Block_Abstract-toHtml() #36 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(389): Mage_Core_Model_Layout-getOutput() #37 /data/web/A14237/htdocs/magento/app/code/core/Mage/Sales/controllers/OrderController.php(100): Mage_Core_Controller_Varien_Action-renderLayout() #38 /data/web/A14237/htdocs/magento/app/code/core/Mage/Sales/controllers/OrderController.php(136): Mage_Sales_OrderController-_viewAction() #39 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Sales_OrderController-viewAction() #40 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action-dispatch('view') #41 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(177): Mage_Core_Controller_Varien_Router_Standard-match(Object(Mage_Core_Controller_Request_Http)) #42 /data/web/A14237/htdocs/magento/app/code/core/Mage/Core/Model/App.php(304): Mage_Core_Controller_Varien_Front-dispatch() #43 /data/web/A14237/htdocs/magento/app/Mage.php(596): Mage_Core_Model_App-run(Array) #44 /data/web/A14237/htdocs/magento/index.php(78): Mage::run('', 'store') #45 {main} gtx, koko

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• Nasty mono bug with F#

  - by Aurimas Anskaitis

  Hi, I have this monstrous f# 2.0 program My mono version is Mono JIT compiler version 2.9 (master/f593354 Sun Dec 26 03:15:55 EET 2010) Copyright (C) 2002-2010 Novell, Inc and Contributors. www.mono-project.com TLS: __thread SIGSEGV: altstack Notifications: epoll Architecture: x86 Disabled: none Misc: softdebug LLVM: supported, not enabled. GC: Included Boehm (with typed GC and Parallel Mark) //--------------------------------------------- module Main let rec gcd x y = if y = 0 then x else gcd y (x%y) let main = printfn "%i" (gcd 4 2) main //----------------------------------------------- And the problem is that output from running the program is as follows: Stacktrace: at (wrapper managed-to-native) System.Reflection.MonoMethodInfo.get_parameter_info (intptr,System.Reflection.MemberInfo) <0xffffffff at System.Reflection.MonoMethodInfo.GetParametersInfo (intptr,System.Reflection.MemberInfo) <0x00013 at System.Reflection.MonoCMethod.GetParameters () <0x00015 at System.Reflection.MonoCMethod.Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) <0x00035 at System.Reflection.MonoCMethod.Invoke (System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) <0x00024 at System.Reflection.ConstructorInfo.Invoke (object[]) <0x0003f at System.Activator.CreateInstance (System.Type,bool) <0x0017c at System.Activator.CreateInstance (System.Type) <0x00012 at Microsoft.FSharp.Reflection.FSharpValue.MakeFunction (System.Type,Microsoft.FSharp.Core.FSharpFunc2<object, object>) <0x00145> at Microsoft.FSharp.Core.PrintfImpl.capture@529<b, c, d> (Microsoft.FSharp.Core.FSharpFunc2, Microsoft.FSharp.Core.FSharpFunc`2<char, Microsoft.FSharp.Core.Unit>, Microsoft.FSharp.Core.FSharpFunc`2,string,int,Microsoft.FSharp.Collections.FSharpList1<object>,System.Type,int) <0x00147> at Microsoft.FSharp.Core.PrintfImpl.gprintf<b, c, d, a> (Microsoft.FSharp.Core.FSharpFunc2, Microsoft.FSharp.Core.FSharpFunc`2<char, Microsoft.FSharp.Core.Unit>, Microsoft.FSharp.Core.FSharpFunc`2,Microsoft.FSharp.Core.PrintfFormat4<a, b, c, d>) <0x000dd> at Microsoft.FSharp.Core.PrintfModule.kprintf_imperative<a, b, c> (Microsoft.FSharp.Core.FSharpFunc2,b,Microsoft.FSharp.Core.FSharpFunc2<char, Microsoft.FSharp.Core.Unit>,Microsoft.FSharp.Core.PrintfFormat4) <0x00058 at Microsoft.FSharp.Core.PrintfModule.PrintFormatToTextWriterThen (Microsoft.FSharp.Core.FSharpFunc2<Microsoft.FSharp.Core.Unit, TResult>,System.IO.TextWriter,Microsoft.FSharp.Core.PrintfFormat4) <0x0004d at Microsoft.FSharp.Core.PrintfModule.PrintFormatLineToTextWriter (System.IO.TextWriter,Microsoft.FSharp.Core.PrintfFormat`4) <0x0004d at .$Main.main@ () <0x00042 Native stacktrace: mono() [0x80dc13b] mono() [0x811c65b] mono() [0x8059a11] [0x7af40c] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228214] mono() [0x8228282] mono() [0x822991e] mono() [0x822aa9d] mono(mono_array_new_specific+0xea) [0x813ba9a] mono() [0x81c63a1] mono() [0x8149ac8] [0xc04328] [0xc042e4] [0xc042be] [0xc0455e] [0xc0451d] [0xc044d8] [0xc0349d] [0xc0330b] [0xc02f9e] [0xbfe960] [0xbfe6c6] [0xbfe571] [0xbfe4de] [0xbfe44e] [0xbf9d2b] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] [0x9bf0724] Debug info from gdb: Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf ptrace: Operation not permitted. ================================================================= Got a SIGSEGV while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries used by your application. Aborted It is a huge problem with mono or f#? By the way, the same function works when using pattern matching instead of "if".

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• .NET Framework generates strange DCOM error

  - by Anders Oestergaard Jensen

  Hello, I am creating a simple application that enables merging of key-value pairs fields in a Word and/or Excel document. Until this day, the application has worked out just fine. I am using the latest version of .NET Framework 4.0 (since it provides a nice wrapper API for Interop). My sample merging method looks like this: public byte[] ProcessWordDocument(string path, List<KeyValuePair<string, string>> kvs) { logger.InfoFormat("ProcessWordDocument: path = {0}", path); var localWordapp = new Word.Application(); localWordapp.Visible = false; Word.Document doc = null; try { doc = localWordapp.Documents.Open(path, ReadOnly: false); logger.Debug("Executing Find->Replace..."); foreach (Word.Range r in doc.StoryRanges) { foreach (KeyValuePair<string, string> kv in kvs) { r.Find.Execute(Replace: Word.WdReplace.wdReplaceAll, FindText: kv.Key, ReplaceWith: kv.Value, Wrap: Word.WdFindWrap.wdFindContinue); } } logger.Debug("Done! Saving document and cleaning up"); doc.Save(); doc.Close(); System.Runtime.InteropServices.Marshal.ReleaseComObject(doc); localWordapp.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(localWordapp); logger.Debug("Done."); return System.IO.File.ReadAllBytes(path); } catch (Exception ex) { // Logging... // doc.Close(); if (doc != null) { doc.Close(); System.Runtime.InteropServices.Marshal.ReleaseComObject(doc); } localWordapp.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(localWordapp); throw; } } The above C# snippet has worked all fine (compiled and deployed unto a Windows Server 2008 x64) with latest updates installed. But now, suddenly, I get the following strange error: System.Runtime.InteropServices.COMException (0x80080005): Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)). at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at Meeho.Integration.OfficeHelper.ProcessWordDocument(String path, List`1 kvs) in C:\meeho\src\webservices\Meeho.Integration\OfficeHelper.cs:line 30 at Meeho.IntegrationService.ConvertDocument(Byte[] template, String ext, String[] fields, String[] values) in C:\meeho\src\webservices\MeehoService\IntegrationService.asmx.cs:line 49 -- I googled the COM error, but it returns nothing of particular value. I even gave the right permissions for the COM dll's using mmc -32, where I allocated the Word and Excel documents respectively and set the execution rights to the Administrator. I could not, however, locate the dll's by the exact COM CLSID given above. Very frustrating. Please, please, please help me as the application is currently pulled out of production. Anders EDIT: output from the Windows event log: Faulting application name: WINWORD.EXE, version: 12.0.6514.5000, time stamp: 0x4a89d533 Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000 Exception code: 0xc0000005 Fault offset: 0x00000000 Faulting process id: 0x720 Faulting application start time: 0x01cac571c4f82a7b Faulting application path: C:\Program Files (x86)\Microsoft Office\Office12\WINWORD.EXE Faulting module path: unknown Report Id: 041dd5f9-3165-11df-b96a-0025643cefe6 - 1000 2 100 0x80000000000000 2963 Application meeho3 - WINWORD.EXE 12.0.6514.5000 4a89d533 unknown 0.0.0.0 00000000 c0000005 00000000 720 01cac571c4f82a7b C:\Program Files (x86)\Microsoft Office\Office12\WINWORD.EXE unknown 041dd5f9-3165-11df-b96a-0025643cefe6

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• ADO.NET Data Services Entity Framework request error when property setter is internal

  - by Jim Straatman

  I receive an error message when exposing an ADO.NET Data Service using an Entity Framework data model that contains an entity (called "Case") with an internal setter on a property. If I modify the setter to be public (using the entity designer), the data services works fine. I don’t need the entity "Case" exposed in the data service, so I tried to limit which entities are exposed using SetEntitySetAccessRule. This didn’t work, and service end point fails with the same error. public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("User", EntitySetRights.AllRead); } The error message is reported in a browser when the .svc endpoint is called. It is very generic, and reads “Request Error. The server encountered an error processing the request. See server logs for more details.” Unfortunately, there are no entries in the System and Application event logs. I found this stackoverflow question that shows how to configure tracing on the service. After doing so, the following NullReferenceExceptoin error was reported in the trace log. Does anyone know how to avoid this exception when including an entity with an internal setter? Blockquote 131076 3 0 2 MOTOJIM http://msdn.microsoft.com/en-US/library/System.ServiceModel.Diagnostics.TraceHandledException.aspx Handling an exception. 685a2910-19-128703978432492675 System.NullReferenceException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Object reference not set to an instance of an object. at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMemberMetadata(ResourceType resourceType, MetadataWorkspace workspace, IDictionary2 entitySets, IDictionary2 knownTypes) at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMetadata(IDictionary2 knownTypes, IDictionary2 entitySets) at System.Data.Services.Providers.BaseServiceProvider.PopulateMetadata() at System.Data.Services.DataService1.CreateProvider(Type dataServiceType, Object dataSourceInstance, DataServiceConfiguration&amp; configuration) at System.Data.Services.DataService1.EnsureProviderAndConfigForRequest() at System.Data.Services.DataService1.ProcessRequestForMessage(Stream messageBody) at SyncInvokeProcessRequestForMessage(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet) </StackTrace> <ExceptionString>System.NullReferenceException: Object reference not set to an instance of an object. at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMemberMetadata(ResourceType resourceType, MetadataWorkspace workspace, IDictionary2 entitySets, IDictionary2 knownTypes) at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMetadata(IDictionary2 knownTypes, IDictionary2 entitySets) at System.Data.Services.Providers.BaseServiceProvider.P

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• c# - PubNub JSON serialization code works in example project but not in my project

  - by pilau

  I am making a Winamp plugin with the single function of sending the details of the song being played over HTTP to a webpage. It works like this: Winamp song event triggered - check for new song - publish to webpage using PubNub (C# API). So far I got to the stage where everything works exactly as it is supposed to, except for the PubNub code which doesn't serialize the object I'm passing for publishing into JSON. All I keep getting in the PubNub console is a mere {} - an empty JSON object. A little background on the project structure: I am using Sharpamp which is a custom library that enables making Winamp plugins with C#. I am also using the PubNub C# API. The gen_notifier_cs project is the C++ plugin wrapper created by Sharpamp. notifier_cs is where all my code resides. The two other projects are self explanatory I assume. I have referenced the PubNub API in notifier_cs, and also have referenced Sharpamp in both notifier_cs and PubNub API. So, the objects that need to get serialized are of a class Song as defined in Sharpamp: public class Song { public string Title { get; internal set; } public string Artist { get; internal set; } public string Album { get; internal set; } public string Year { get; internal set; } public bool HasMetadata { get; internal set; } public string Filename { get; internal set; } } So let's say if I have a song object with song data in it, I would go pubnub.publish("winamp_pipe", song); to publish it and PubNub will automatically serialize the data into JSON. But that's just not working in my solution. To test why it wasn't serializing, I copied that class to the example code file in the PubNub API. Visual Studio changed the class to this (notice the public Song() method): public class Song { public Song() { return; } public string Album { get; set; } public string Artist { get; set; } public string Filename { get; set; } public bool HasMetadata { get; set; } public string Title { get; set; } public string Year { get; set; } } On the same example file I initiated a default song object with some values: Song song = new Song(); song.Album = "albumname"; song.Artist = "artistname"; song.HasMetadata = true; song.Title = "songtitle"; song.Year = "2012"; And published it: pubnub.publish("winamp_pipe", song); and it worked! I got the JSON object in the PubNub channel! {"Album":"albumname","Artist":"artistname","Filename":null,"HasMetadata":true,"Title":"songtitle","Year":"2012"} So, I tried replacing the "new" Song class with the original one defined in Sharpamp. I tried adding another class definition in the notifier_cs project but that clashes with the one in Sharpamp which I have to rely on. I have been trying so many things as far as I could come up with. Needless to say none prevailed. Still, all I get is an empty JSON object. I have been pulling out my hair for the last day. I know this post is super long but I appreciate your input nonetheless. Thanks in advance.

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• ASP.NET Web Service Throws 401 (unauthorized) Error

  - by user268611

  Hi Experts, I have this .NET application to be run in an intranet environment. It is configured so that it requires Windows Authentication before you can access the website (Anonymous access is disabled). This website calls a web service (enable anonymous access) and the web service calls the DB. We do have a token-based authentication between the web application and the web service to secure the communication between them. The issue I'm facing is that when I deploy this to production, I'm having an intermittent issue whereby the communication between the web application and the web service failed. The 401 issue was thrown. This is actually working fine in our QA environment. Is this an issue with Active Directory? Or could it be an isssue with FQDN as mentioned here: http://support.microsoft.com/default.aspx?scid=kb;en-us;896861? The weirdest thing is that this is happening intermittently when tested in both on the server itself and a remote workstation in my client's environment. But, this is working perfectly in my environment. OS: Windows Server SP1 IIS 6 .NET 3.5 Framework Any idea about the 401 (Unauthorized) issue?? Thx for the help... This is from the log... Event code: 3005 Event message: An unhandled exception has occurred. Event time: 4/5/2010 10:44:57 AM Event time (UTC): 4/5/2010 2:44:57 AM Event ID: 6c8ea2607b8d4e29a7f0b1c392b1cb21 Event sequence: 155112 Event occurrence: 2 Event detail code: 0 Application information: Application domain: xxx Trust level: Full Application Virtual Path: xxx Application Path: xxx Machine name: xxx Process information: Process ID: 4424 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE Exception information: Exception type: WebException Exception message: The request failed with HTTP status 401: Unauthorized. Request information: Request URL: http://[ip]/[app_path] Request path: xxx User host address: [ip] User: xxx Is authenticated: True Authentication Type: Negotiate Thread account name: xxx Thread information: Thread ID: 6 Thread account name: xxx Is impersonating: False Stack trace: at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at wsVulnerabilityAdvisory.Service.test() at test.Page_Load(Object sender, EventArgs e) at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

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• XStream JavaBeanConverter not serializing properties

  - by Steve Foster

  Hello All, Attempting to use XStream's JavaBeanConverter and running into an issue. Most likely I'm missng something simple, or not understanding XStream's converter handling well enough. @XStreamAlias("test") public class TestObject { private String foo; public String getFoo() { return foo; } public void setFoo(String foo) { this.foo = foo; } } public void test() throws Exception { XStream x = new XStream(new XppDriver()); x.autodetectAnnotations(true); x.processAnnotations(TestObject.class); x.registerConverter(new JavaBeanConverter(x.getMapper())); TestObject o = new TestObject(); o.setFoo("bar"); String xml = x.toXML(o); System.out.println(xml); /* Expecting... <test> <foo>bar</foo> </test> But instead getting... <test> <foo/> </test> */ } I tried adding a trace on the TestObject.getFoo() method and it appears it is being called by XStream, but the data isn't being written to the output stream. After looking at the source for JavaBeanConverter, it looks like my implementation should work, which leads me to believe I haven't configured something correctly during the XStream setup. Am I just missing something simple? Thanks! Edit Also, if it helps, I'm using the following Maven deps for this... <dependency> <groupId>org.apache.servicemix.bundles</groupId> <artifactId>org.apache.servicemix.bundles.xstream</artifactId> <version>1.3_3</version> </dependency> <dependency> <groupId>org.apache.servicemix.bundles</groupId> <artifactId>org.apache.servicemix.bundles.xpp3</artifactId> <version>1.1.4c_3</version> </dependency>

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• .exe File becomes corrupted when downloaded from server

  - by Kerri

  Firstly: I'm a lowly web designer who knows just enough PHP to be dangerous and just enough about server administration to be, well, nothing. I probably won't understand you unless you're very clear! The setup: I've set up a website where the client uploads files to a specific directory, and those files are made available, through php, for download by users. The files are generally executable files over 50MB. The client does not want them zipped, as they feel their users aren't savvy enough to unzip them. I'm using the php below to force a download dialogue box and hide the directory where the files are located. It's Linux server, if that makes a difference. The problem: There is a certain file that becomes corrupt after the user tries to download it. It is an executable file, but when it's clicked on, a blank DOS window opens up. The original file, prior to download opens perfectly. There are several other similar files that go through the same exact download procedure, and all of those work just fine. Things I've tried: I've tried uploading the file zipped, then unzipping it on the server to make sure it wasn't becoming corrupt during upload, and no luck. I've also compared the binary code of the original file to the downloaded file that doesn't work, and their exactly the same (so the php isn't accidentally inserting anything extra into the file). Could it be an issue with the headers in my downloadFile function? I really am not sure how to troubleshoot this one… This is the download php, if it's relevant ($filenamereplace is defined elsewhere): downloadFile("../DOWNLOADS/files/$filenamereplace","$filenamereplace"); function downloadFile($file,$filename){ if(file_exists($file)) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: ' . filesize($file)); @ flush(); readfile($file); exit; } }

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• Using Artificial Intelligence (AI) to predict Stock Prices

  - by akaphenom

  Given a set of datavery similar to the Motley Fool CAPS system, where individual users enter BUY and SELL recommendations on various equities. What I would like to do is show each recommendation and I guess some how rate (1-5) as to whether it was good predictor<5 (ie corellation coeffient = 1) of the future stock price (or eps or whatever) or a horrible predictor (ie corellation coeffient = -1) or somewhere inbetween. Each recommendation is tagged to a particular user, so that can be tracked over time. I can also track market direction (bullish / bearish) based off of something like sp500 price. The components I think that would make sense in the model would be: user direction (long/short) market direction sector of stock The thought is that some users are better in bull markets than bear (and vice versa), and some are better at shorts than longs- and then a cobination the above. I can automatically tag the market direction and sector (based off the market at the time and the equity being recommended). The thought is that I could present a series of screens and allow me to rank each individual recommendation by displaying available data absolute, market and sector out performance for a specfic time period out. I would follow a detailed list for ranking the stocks so that the ranking is as objective as possible. My assumtion is that a single user is right no more than 57% of the time - but who knows. I could load the system and say "Lets rank the recommendation as a predictor of stock value 90 days forward"; and that would represent a very explicit set of rankings. NOW here is the crux - I want to create some sort of machine learning algorithm that can identify patterns over a series of time so that as recommendations stream into the application we maintain a ranking of that stock (ie. similar to correlation coeeficient) as to the likelihood of that recommendation (in addition to the past series of recommendations ) will affect the price. Now here is the super crux. I have never taken an AI class / read an AI book / never mind specific to machine learning. So I cam looking for guidance - sample or description of a similar system I could adapt. Place to look for info or any general help. Or even push me in the right direction to get started... My hope is to implment this with F# and be able to impress my friends with a new skillset in F# with an implementation of machine learnign and potentially something (application / source) I can include in a tech portfolio or blog space; Thank you for any advice in advance.

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• Insert a doctype into an XML document (Java/ SAX)

  - by Thom Nichols

  Imagine you have an XML document and imagine you have the DTD but the document itself doesn't actually specify a DOCTYPE ... How would you insert the DOCTYPE declaration, preferably by specifying it on the parser (similar to how you can set the schema for a document that will be parsed) or by inserting the necessary SAX events via an XMLFilter or the like? I've found many references to EntityResolver, but that is what's invoked once a DOCTYPE is found during parsing and it's used to point to a local DTD file. EntityResolver2 appears to have what I'm looking for but I haven't found any examples of usage. This is the closest I've come thus far: (code is Groovy, but close enough that you should be able to understand it...) import org.xml.sax.* import org.xml.sax.ext.* import org.xml.sax.helpers.* class XmlFilter extends XMLFilterImpl { public XmlFilter( XMLReader reader ) { super(reader) } @Override public void startDocument() { super.startDocument() super.resolveEntity( null, 'file:///./entity.dtd') println "filter startDocument" } } class MyHandler extends DefaultHandler2 { public InputSource resolveEntity(String name, String publicId, String baseURI, String systemId) { println "entity: $name, $publicId, $baseURI, $systemId" return new InputSource(new StringReader('<!ENTITY asdf "&#161;">')) } } def handler = new MyHandler() def parser = XMLReaderFactory.createXMLReader() parser.setFeature 'http://xml.org/sax/features/use-entity-resolver2', true def filter = new XmlFilter( parser ) filter.setContentHandler( handler ) filter.setEntityResolver( handler ) filter.parse( new InputSource(new StringReader('''<?xml version="1.0" ?> <test>one &asdf; two! &nbsp; &iexcl;&pound;&cent;</test>''')) ); I see resolveEntity called but still hit org.xml.sax.SAXParseException: The entity "asdf" was referenced, but not declared. at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231) at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:333) I guess this is because there's no way to add SAX events that the parser knows about, I can only add events via a filter that's upstream from the parser which are passed along to the ContentHandler. So the document has to be valid going into the XMLReader. Any way around this? I know I can modify the raw stream to add a doctype or possibly do a transform to set a DTD... Any other options?

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• Does writing data to server using Java URL class require response from server?

  - by gigadot

  I am trying to upload files using Java URL class and I have found a previous question on stack-overflow which explains very well about the details, so I try to follow it. And below is my code adopted from the sniplet given in the answer. My problem is that if I don't make a call to one of connection.getResponseCode() or connection.getInputStream() or connection.getResponseMessage() or anything which is related to reponse from the server, the request will never be sent to server. Why do I need to do this? Or is there any way to write the data without getting the response? P.S. I have developed a server-side uploading servlet which accepts multipart/form-data and save it to files using FileUpload. It is stable and definitely working without any problem so this is not where my problem is generated. import java.io.Closeable; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.net.HttpURLConnection; import java.net.URL; import org.apache.commons.io.IOUtils; public class URLUploader { public static void closeQuietly(Closeable... objs) { for (Closeable closeable : objs) { IOUtils.closeQuietly(closeable); } } public static void main(String[] args) throws IOException { File textFile = new File("D:\\file.zip"); String boundary = Long.toHexString(System.currentTimeMillis()); // Just generate some unique random value. HttpURLConnection connection = (HttpURLConnection) new URL("http://localhost:8080/upslet/upload").openConnection(); connection.setDoOutput(true); connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); OutputStream output = output = connection.getOutputStream(); PrintWriter writer = writer = new PrintWriter(output, true); // Send text file. writer.println("--" + boundary); writer.println("Content-Disposition: form-data; name=\"file1\"; filename=\"" + textFile.getName() + "\""); writer.println("Content-Type: application/octet-stream"); FileInputStream fin = new FileInputStream(textFile); writer.println(); IOUtils.copy(fin, output); writer.println(); // End of multipart/form-data. writer.println("--" + boundary + "--"); output.flush(); closeQuietly(fin, writer, output); // Above request will never be sent if .getInputStream() or .getResponseCode() or .getResponseMessage() does not get called. connection.getResponseCode(); } }

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• Synchronization requirements for FileStream.(Begin/End)(Read/Write)

  - by Doug McClean

  Is the following pattern of multi-threaded calls acceptable to a .Net FileStream? Several threads calling a method like this: ulong offset = whatever; // different for each thread byte[] buffer = new byte[8192]; object state = someState; // unique for each call, hence also for each thread lock(theFile) { theFile.Seek(whatever, SeekOrigin.Begin); IAsyncResult result = theFile.BeginRead(buffer, 0, 8192, AcceptResults, state); } if(result.CompletedSynchronously) { // is it required for us to call AcceptResults ourselves in this case? // or did BeginRead already call it for us, on this thread or another? } Where AcceptResults is: void AcceptResults(IAsyncResult result) { lock(theFile) { int bytesRead = theFile.EndRead(result); // if we guarantee that the offset of the original call was at least 8192 bytes from // the end of the file, and thus all 8192 bytes exist, can the FileStream read still // actually read fewer bytes than that? // either: if(bytesRead != 8192) { Panic("Page read borked"); } // or: // issue a new call to begin read, moving the offsets into the FileStream and // the buffer, and decreasing the requested size of the read to whatever remains of the buffer } } I'm confused because the documentation seems unclear to me. For example, the FileStream class says: Any public static members of this type are thread safe. Any instance members are not guaranteed to be thread safe. But the documentation for BeginRead seems to contemplate having multiple read requests in flight: Multiple simultaneous asynchronous requests render the request completion order uncertain. Are multiple reads permitted to be in flight or not? Writes? Is this the appropriate way to secure the location of the Position of the stream between the call to Seek and the call to BeginRead? Or does that lock need to be held all the way to EndRead, hence only one read or write in flight at a time? I understand that the callback will occur on a different thread, and my handling of state, buffer handle that in a way that would permit multiple in flight reads. Further, does anyone know where in the documentation to find the answers to these questions? Or an article written by someone in the know? I've been searching and can't find anything. Relevant documentation: FileStream class Seek method BeginRead method EndRead IAsyncResult interface

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• How to login to wordpress programmatically?

  - by T-Rex

  I need to perform some action in wordpress admin panel programmatically but can't manage how to login to Wordpress using C# and HttpWebRequest. Here is what I do: private void button1_Click(object sender, EventArgs e) { string url = "http://localhost/wordpress/wp-login.php"; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); CookieContainer cookies = new CookieContainer(); SetupRequest(url, request, cookies); //request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"; //request.Headers["Accept-Language"] = "uk,ru;q=0.8,en-us;q=0.5,en;q=0.3"; //request.Headers["Accept-Encoding"] = "gzip,deflate"; //request.Headers["Accept-Charset"] = "windows-1251,utf-8;q=0.7,*;q=0.7"; string user = "test"; string pwd = "test"; request.Credentials = new NetworkCredential(user, pwd); string data = string.Format( "log={0}&pwd={1}&wp-submit={2}&testcookie=1&redirect_to={3}", user, pwd, System.Web.HttpUtility.UrlEncode("Log In"), System.Web.HttpUtility.UrlEncode("http://localhost/wordpress/wp-admin/")); SetRequestData(request, data); ShowResponse(request); } private static void SetupRequest(string url, HttpWebRequest request, CookieContainer cookies) { request.CookieContainer = cookies; request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.0; uk; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)"; request.KeepAlive = true; request.Timeout = 120000; request.Method = "POST"; request.Referer = url; request.ContentType = "application/x-www-form-urlencoded"; } private void ShowResponse(HttpWebRequest request) { HttpWebResponse response = (HttpWebResponse)request.GetResponse(); responseTextBox.Text = (((HttpWebResponse)response).StatusDescription); responseTextBox.Text += "\r\n"; StreamReader reader = new StreamReader(response.GetResponseStream()); responseTextBox.Text += reader.ReadToEnd(); } private static void SetRequestData(HttpWebRequest request, string data) { byte[] streamData = Encoding.ASCII.GetBytes(data); request.ContentLength = streamData.Length; Stream dataStream = request.GetRequestStream(); dataStream.Write(streamData, 0, streamData.Length); dataStream.Close(); } But unfortunately in responce I get only HTML source code of login page and it seems that cookies don't contain session ID. All requests which I perform after that code also return HTML source of login page so I can assume that it does not login correctly. Can anybody help me to solve that problem or give working example? Main thing which I want to achieve is scanning for new images in Nextgen Gallery plugin for Wordpress. Is there XML-RPC way of doing that? Thanks in advance.

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• Partial view links not working in Fire Fox

  - by user329540

  I have a MVC4 asp.net application, I have two layouts a main layout for the main page and a second layout for the nested pages. The problem I have is with the second layout, on this layout I call a partial view which has my navigation links. In IE the navigation menu displays fine and when each item is clicked it navigates as expected. However in FF when the page renders the navigation bar is displayed but it has no 'click functionality' if you will its as if its simply text. My layout of nested page: <header> <img src="../../Images/fronttop.png" id="nestedPageheader" alt="Background Img"/> <div class="content-wrapper"> <section > <nav> <div id="navcontainer"> </div> </nav> </section> <div> </header> The script to retreive partial view and information for dynamic links on layout page. <script type="text/javascript"> var menuLoaded = false; $(document).ready(function () { if($('#navcontainer')[0].innerHTML.trim() == "") { $.ajax({ url: "@Url.Content("~/Home/MenuLayout")", type: "GET", success: function (response, status, xhr) { var nvContainer = $('#navcontainer'); nvContainer.html(response); menuLoaded = true; }, error: function (XMLHttpRequest, textStatus, errorThrown) { var nvContainer = $('#navcontainer'); nvContainer.html(errorThrown); } }); } }); </script> May partial view: @model Mscl.OpCost.Web.Models.stuffmodel <div class="menu"> <ul> <li><a>@Html.ActionLink("Home", "Index", "Home")</a></li> <li><a>@Html.ActionLink("some stuff", "stuffs", "stuff")</a></li> <li> <h5><a><span>somestuff</span></a></h5> <ul> <li><a>stuffs1s</a> <ul> @foreach (var image in Model.stuffs.Where(g => g.Grouping == 1)) { <li> <a>@Html.ActionLink(image.Title, "stuffs", "stuff", new { Id = image.CategoryId }, null)</a> </li> } </ul> </li> </ul> </il> </ul> </div> I need to know why this works fine in IE but why its not working in FF(all versions). Any assistance would be appreciated.

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• Azure storage: Uploaded files with size zero bytes

  - by Fabio Milheiro

  When I upload an image file to a blob, the image is uploaded apparently successfully (no errors). When I go to cloud storage studio, the file is there, but with a size of 0 (zero) bytes. The following is the code that I am using: // These two methods belong to the ContentService class used to upload // files in the storage. public void SetContent(HttpPostedFileBase file, string filename, bool overwrite) { CloudBlobContainer blobContainer = GetContainer(); var blob = blobContainer.GetBlobReference(filename); if (file != null) { blob.Properties.ContentType = file.ContentType; blob.UploadFromStream(file.InputStream); } else { blob.Properties.ContentType = "application/octet-stream"; blob.UploadByteArray(new byte[1]); } } public string UploadFile(HttpPostedFileBase file, string uploadPath) { if (file.ContentLength == 0) { return null; } string filename; int indexBar = file.FileName.LastIndexOf('\\'); if (indexBar > -1) { filename = DateTime.UtcNow.Ticks + file.FileName.Substring(indexBar + 1); } else { filename = DateTime.UtcNow.Ticks + file.FileName; } ContentService.Instance.SetContent(file, Helper.CombinePath(uploadPath, filename), true); return filename; } // The above code is called by this code. HttpPostedFileBase newFile = Request.Files["newFile"] as HttpPostedFileBase; ContentService service = new ContentService(); blog.Image = service.UploadFile(newFile, string.Format("{0}{1}", Constants.Paths.BlogImages, blog.RowKey)); Before the image file is uploaded to the storage, the Property InputStream from the HttpPostedFileBase appears to be fine (the size of the of image corresponds to what is expected! And no exceptions are thrown). And the really strange thing is that this works perfectly in other cases (uploading Power Points or even other images from the Worker role). The code that calls the SetContent method seems to be exactly the same and file seems to be correct since a new file with zero bytes is created at the correct location. Does any one have any suggestion please? I debugged this code dozens of times and I cannot see the problem. Any suggestions are welcome! Thanks

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• How to avoid using duplicate savepoint names in nested transactions in nested stored procs?

  - by Gary McGill

  I have a pattern that I almost always follow, where if I need to wrap up an operation in a transaction, I do this: BEGIN TRANSACTION SAVE TRANSACTION TX -- Stuff IF @error <> 0 ROLLBACK TRANSACTION TX COMMIT TRANSACTION That's served me well enough in the past, but after years of using this pattern (and copy-pasting the above code), I've suddenly discovered a flaw which comes as a complete shock. Quite often, I'll have a stored procedure calling other stored procedures, all of which use this same pattern. What I've discovered (to my cost) is that because I'm using the same savepoint name everywhere, I can get into a situation where my outer transaction is partially committed - precisely the opposite of the atomicity that I'm trying to achieve. I've put together an example that exhibits the problem. This is a single batch (no nested stored procs), and so it looks a little odd in that you probably wouldn't use the same savepoint name twice in the same batch, but my real-world scenario would be too confusing to post. CREATE TABLE Test (test INTEGER NOT NULL) BEGIN TRAN SAVE TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (1) COMMIT TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (2) COMMIT TRAN TX DELETE FROM Test ROLLBACK TRAN TX COMMIT TRAN TX SELECT * FROM Test DROP TABLE Test When I execute this, it lists one record, with value "1". In other words, even though I rolled back my outer transaction, a record was added to the table. What's happening is that the ROLLBACK TRANSACTION TX at the outer level is rolling back as far as the last SAVE TRANSACTION TX at the inner level. Now that I write this all out, I can see the logic behind it: the server is looking back through the log file, treating it as a linear stream of transactions; it doesn't understand the nesting/hierarchy implied by either the nesting of the transactions (or, in my real-world scenario, by the calls to other stored procedures). So, clearly, I need to start using unique savepoint names instead of blindly using "TX" everywhere. But - and this is where I finally get to the point - is there a way to do this in a copy-pastable way so that I can still use the same code everywhere? Can I auto-generate the savepoint name on the fly somehow? Is there a convention or best-practice for doing this sort of thing? It's not exactly hard to come up with a unique name every time you start a transaction (could base it off the SP name, or somesuch), but I do worry that eventually there would be a conflict - and you wouldn't know about it because rather than causing an error it just silently destroys your data... :-(

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• ASP.Net and FaceBook Wall integration

  - by Jit

  Hi, I am new to FaceBook API. I like to send messages when I want from my aspx webpage. I used the different examples and used FaceBook API 3.1. I am getting error as "service temporarily unavailable". I have assigned AppKey, Secret Key and session key. My sample code is below. using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using Facebook; using Facebook.Web; using Facebook.Rest; using Facebook.Session; using Facebook.Utility; using Facebook.BindingHelper; using Facebook.Schema; using Facebook.Web.FbmlControls; using Facebook.Session.DesktopPopup; namespace FaceBookApp { public partial class _Default : System.Web.UI.Page { private const string ApplicationKey = "MY_APP_KEY"; private const string SecretKey = "MY_SECRET_KEY"; private Api fbAPI; private ConnectSession _connectSession; // private List<EventUser> _eventUsers; protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { _connectSession = new ConnectSession(ApplicationKey, SecretKey); _connectSession.SessionKey = "MY_SESSION_KEY"; if (!_connectSession.IsConnected()) { // Not authenticated, proceed as usual. //lblStatus.Text = "Please sign-in with Facebook."; } else { // Authenticated, create API instance fbAPI = new Api(_connectSession); string response = fbAPI.Stream.Publish("publish steven on facebook."); } } } } The error message is confusing. It must be a very simple solution. I don't know what I am missing. Pls help. Here is the facebook exception. {"Service temporarily unavailable"}

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• Extending XHTML

  - by Daniel Schaffer

  I'm playing around with writing a jQuery plugin that uses an attribute to define form validation behavior (yes, I'm aware there's already a validation plugin; this is as much a learning exercise as something I'll be using). Ideally, I'd like to have something like this: Example 1 - input: <input id="name" type="text" v:onvalidate="return this.value.length > 0;" /> Example 2 - wrapper: <div v:onvalidate="return $(this).find('[value]').length > 0;"> <input id="field1" type="text" /> <input id="field2" type="text" /> <input id="field3" type="text" /> </div> Example 3 - predefined: <input id="name" type="text" v:validation="not empty" /> The goal here is to allow my jQuery code to figure out which elements need to be validated (this is already done) and still have the markup be valid XHTML, which is what I'm having a problem with. I'm fairly sure this will require a combination of both DTD and XML Schema, but I'm not really quite sure how exactly to execute. Based on this article, I've created the following DTD: <!ENTITY % XHTML1-formvalidation1 PUBLIC "-//W3C//DTD XHTML 1.1 +FormValidation 1.0//EN" "http://new.dandoes.net/DTD/FormValidation1.dtd" > %XHTML1-formvalidation1; <!ENTITY % Inlspecial.extra "%div.qname; " > <!ENTITY % xhmtl-model.mod SYSTEM "formvalidation-model-1.mod" > <!ENTITY % xhtml11.dtd PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" > %xhtml11.dtd; And here is "formvalidation-model-1": <!ATTLIST %div.qname; %onvalidation CDATA #IMPLIED %XHTML1-formvalidation1.xmlns.extra.attrib; > I've never done DTD before, so I'm not even really exactly sure what I'm doing. When I run my page through the W3 XHTML validator, I get 80+ errors because it's getting duplicate definitions of all the XHTML elements. Am I at least on the right track? Any suggestions? EDIT: I removed this section from my custom DTD, because it turned out that it was actually self-referencing, and the code I got the template from was really for combining two DTDs into one, not appending specific items to one: <!ENTITY % XHTML1-formvalidation1 PUBLIC "-//W3C//DTD XHTML 1.1 +FormValidation 1.0//EN" "http://new.dandoes.net/DTD/FormValidation1.dtd" > %XHTML1-formvalidation1; I also removed this, because it wasn't validating, and didn't seem to be doing anything: <!ENTITY % Inlspecial.extra "%div.qname; " > Additionally, I decided that since I'm only adding a handful of additional items, the separate files model recommended by W3 doesn't really seem that helpful, so I've put everything into the dtd file, the content of which is now this: <!ATTLIST div onvalidate CDATA #IMPLIED> <!ENTITY % xhtml11.dtd PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" > %xhtml11.dtd; So now, I'm not getting any DTD-related validation errors, but the onvalidate attribute still is not valid. Update: I've ditched the DTD and added a schema: http://schema.dandoes.net/FormValidation/1.0.xsd Using v:onvalidate appears to validate in Visual Studio, but the W3C service still doesn't like it. Here's a page where I'm using it so you can look at the source: http://new.dandoes.net/auth And here's the link to the w3c validation result: http://validator.w3.org/check?uri=http://new.dandoes.net/auth&charset=(detect+automatically)&doctype=Inline&group=0 Is this about as close as I'll be able to get with this, or am I still doing something wrong?

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• Asynchronous readback from opengl front buffer using multiple PBO's

  - by KillianDS

  I am developing an application that needs to read back the whole frame from the front buffer of an openGL application. I can hijack the application's opengl library and insert my code on swapbuffers. At the moment I am successfully using a simple but excruciating slow glReadPixels command without PBO's. Now I read about using multiple PBO's to speed things up. While I think I've found enough resources to actually program that (isn't that hard), I have some operational questions left. I would do something like this: create a series (e.g. 3) of PBO's use glReadPixels in my swapBuffers override to read data from front buffer to a PBO (should be fast and non-blocking, right?) Create a seperate thread to call glMapBufferARB, once per PBO after a glReadPixels, because this will block until the pixels are in client memory. Process the data from step 3. Now my main concern is of course in steps 2 and 3. I read about glReadPixels used on PBO's being non-blocking, will this be an issue if I issue new opengl commands after that very fast? Will those opengl commands block? Or will they continue (my guess), and if so, I guess only swapbuffers can be a problem, will this one stall or will glReadPixels from front buffer be many times faster than swapping (about each 15-30ms) or, worst case scenario, will swapbuffers be executed while glReadPixels is still reading data to the PBO? My current guess is this logic will do something like this: copy FRONT_BUFFER - generic place in VRAM, copy VRAM-RAM. But I have no idea which of those 2 is the real bottleneck and more, what the influence on the normal opengl command stream is. Then in step 3. Is it wise to do this asynchronously in a thread separated from normal opengl logic? At the moment I think not, It seems you have to restore buffer operations to normal after doing this and I can't install synchronization objects in the original code to temporarily block those. So I think my best option is to define a certain swapbuffer delay before reading them out, so e.g. calling glReadPixels on PBO i%3 and glMapBufferARB on PBO (i+2)%3 in the same thread, resulting in a delay of 2 frames. Also, when I call glMapBufferARB to use data in client memory, will this be the bottleneck or will glReadPixels (asynchronously) be the bottleneck? And finally, if you have some better ideas to speed up frame readback from GPU in opengl, please tell me, because this is a painful bottleneck in my current system. I hope my question is clear enough, I know the answer will probably also be somewhere on the internet but I mostly came up with results that used PBO's to keep buffers in video memory and do processing there. I really need to read back the front buffer to RAM and I do not find any clear explanations about performance in that case (which I need, I cannot rely on "it's faster", I need to explain why it's faster). Thank you

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• Access violation when accessing a COM object from .Net

  - by Groo

  Dear Sirs, I am sorry if the post is too long, but I would be happy if someone would at least point read the bolded titles, and point me in the right direction. I am having this problem for couple of days, but was unable to found the answer on the net. These are the things I have found out so far. 1. "Access violation" exception crushes my managed application My C# WinForms app sometimes closes with an "Access violation" exception ("Attempted to read or write protected memory"), right in the moment when selecting a TabPage in a windows form TabControl. From the stack trace (try/catch around Application.Run) I can see that the exception happens at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg), called inside UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData). -- Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Stack trace: at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager .System.Windows.Forms.UnsafeNativeMethods .IMsoComponentManager.FPushMessageLoop (Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext .RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext .RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(ApplicationContext context) at MyApp.Program.Main() 2. The faulting module seems to be a COM object (ChartFX Client Server 6.2) Using WinDbg (with SoS loaded), I caught it on the unmanaged side, inside ChartFX.ClientServer.Core.dll (that's a COM charting component we are using): (ca84.c98c): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=00000000 ebx=06e67c38 ecx=06e67c38 edx=000018c6 esi=06e7df30 edi=317a9e80 eip=31666110 esp=0015e040 ebp=0015e08c iopl=0 nv up ei pl zr na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 ChartFX_ClientServer_Core!Ordinal5507+0x97b7: 31666110 8a404d mov al,byte ptr [eax+4Dh] ds:0023:0000004d=?? [edit:] I also wasn't able to get the unmamanged stack details from WinDbg (it said "Stack unwind info not available"): 0:000 kP ChildEBP RetAddr WARNING: Stack unwind information not available. Following frames may be wrong. 0015e08c 3166288b ChartFX_ClientServer_Core!Ordinal5507+0x97b7 0015e394 3165a921 ChartFX_ClientServer_Core!Ordinal5507+0x5f32 0015e480 31678685 ChartFX_ClientServer_Core!Ordinal5496+0x26a 0015e568 3167bef4 ChartFX_ClientServer_Core!Ordinal5492+0x975 0015e668 316a356b ChartFX_ClientServer_Core!Ordinal5492+0x41e4 0015e77c 31709496 ChartFX_ClientServer_Core!Ordinal443+0x5745 0015e7d0 31707f70 ChartFX_ClientServer_Core!Ordinal2584+0x3cdc 0015e7f8 3170817d ChartFX_ClientServer_Core!Ordinal2584+0x27b6 0015e81c 3162fd76 ChartFX_ClientServer_Core!Ordinal2584+0x29c3 0015e86c 7719f8d2 ChartFX_ClientServer_Core!Ordinal899+0x6b6 0015e898 7719f794 USER32!GetMessageW+0x93 0015e910 771a06f6 USER32!GetWindowLongW+0x115 0015e940 771a069c USER32!CallWindowProcW+0x75 0015e960 747fcef4 USER32!CallWindowProcW+0x1b 0015e97c 747fd073 comctl32!Ordinal377+0x5c 0015e9e0 747fd027 comctl32!DefSubclassProc+0x92 0015ea04 747fd4e6 comctl32!DefSubclassProc+0x46 0015ea20 747fd073 comctl32!DefSubclassProc+0x505 0015ea84 747fd118 comctl32!DefSubclassProc+0x92 0015eae4 7719f8d2 comctl32!DefSubclassProc+0x137 3. Bug is not easy to reproduce (although it can be provoked usually in less than 5 min.) I have several Chart instances in several TabPages, and this usually happens while I am switching the tabs. I still don't know how to reproduce it, besides switching those tabs for several minutes before it happens, so I cannot use our source control to reliably find the build which didn't have this problem. I am accessing the charts through the managed AxChart wrapper class (derived from AxHost), which was created by VS designer automatically. 4. What should be my next step? If someone could point me to the next step I should do to find the actual cause, I would be very grateful. Experimenting (removing and returning code) does not do much good, because I don't know how to reproduce it, so it would take large amounts of time on each iteration just to convince myself that the bug is still there. I have found that people often suggest something like "switching compiler optimizations", but since the exception is not thrown deterministically, I don't want to simply rearrange some bytes and hope that it never returns. Thanks a lot in advance! Best regards, Groo

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