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  • Test if char is '0'-'9' [migrated]

    - by Chris Okyen
    My Java code is // if the first character is not 0-9 if( (((input.substring(0,0)).compareTo("1")) < 0 || (((input.substring(0,0)).compareTo("9")) < 0)); { System.out.println("Error: The first digit of the temperature is not 1-9. Force Exiting Program. "); System.exit(1); // exit the program } But it slips through even with input like '1123' or '912' or '222', and gives this error message. Whether I have it 0 for first and < 0 for the second, or 0 and 0, or < 0 and < 0, or even < o and 0... How come?

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  • New! EBS : Search Helper for RVTII-060 Errors in Receiving (Doc ID 1391970.1)

    - by Oracle_EBS
    Next time you experience the RVTII-060 error when doing a receipt in Procurement, try our new Search Helper in DOC ID 1391970.1.  As shown in the screenshot below, simply pick the error you are experiencing and the symptom or symptoms that pertain and notes with possible solutions or help will be returned.  Drill down and review the notes to see if your issue can be resolved.  Choose the 'View Demonstration Video' link to watch a quick video for more information on how to use the Search Helper. To see all Procurement Search helpers go to the Procurement Product Information Centers in DOC ID 1391332.2.

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  • Software Center crashes and terminal errors

    - by user97521
    *note*I'm a new user to Ask Ubuntu and I've only recently switched to Ubuntu 12.04. When I try to open the software center (Ubuntu 12.04 32-bit) it will flash open, load for maybe 1-2 seconds, and then close. When i try using: sudo apt-get purge software center sudo apt-get install sudo apt-get update sudo apt-get upgrade I get this within the terminal: Reading package lists... Error! E: Problem parsing dependency Depends E: Error occurred while processing printer-driver-hpcups (NewVersion2) E: Problem with MergeList /var/lib/dpkg/status E: The package lists or status file could not be parsed or opened. *The problem fixed itself after I shut down my laptop for the night and turned it back on to check my e-mail this afternoon. If anyone could tell me how to fix this problem in the future please do, I would like to learn about these kind of things because i don't plan on putting windows on my laptop again :P *

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  • No sound in World of Goo?

    - by user37805
    I installed WorldOfGooSetup.1.41.deb and it didn't work. There was a segmentation fault error (core dumped) in terminal. I fixed that with: sudo cp /usr/lib/x86_64-linux-gnu/libvorbis.so.* /opt/WorldOfGoo/libs32 sudo cp /usr/lib/x86_64-linux-gnu/libvorbis.so.* /opt/WorldOfGoo/libs64 That error is new for me as I have never had it before with previous releases of Ubuntu. The game starts now but no sound effects or music is played. I can hear music with my computer, videos, etc, so it is not a volume control problem. I am using ubuntu 12.04 final release.

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  • Googling query from anywhere

    - by Shagun
    Some times when I am trying out stuff on my terminal, I get some blockade or some error to resolve which I have to copy the error or last message then open my browser and then Google the query. Is it possible for me that I select the message via mouse and when I right click I get a Google it option as I get when I select some text on a browser? PS : I am not asking how to do Google search via terminal or how to browse web via terminal.These were the results I got when I goggled my question. what I want is something more general. Whenever I select a piece of text I should get a "Google me" option with the right click of my mouse(or maybe with pressing of a key or something). I would prefer that the query takes place in a browser and not in a terminal.

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  • Can't read dvd in ubuntu 12.04

    - by Italo Maia
    My laptop has xubuntu 12.04 installed and I can't read dvds burned in my dvd recorder. To read my dvds, I had to use a external USB dvd driver (in xubuntu). Using dsmeg, I got this message: dmesg | grep "sr0" [11793.286196] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [11793.286202] sr 2:0:0:0: [sr0] Sense Key : Medium Error [current] [11793.286211] sr 2:0:0:0: [sr0] Add. Sense: Cannot read medium - unknown format [11793.286221] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00 [11793.286240] end_request: I/O error, dev sr0, sector 0 My laptop is an Asus N43SN.

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  • What are "Failed to fetch cdrom" errors in Update Manager and how do I fix them? [closed]

    - by gcc
    Possible Duplicate: Failed to download repository information due to missing CDROM Whenever I run update-manager, I am getting the following error: Failed to fetch cdrom://Ubuntu 10.04.2 LTS _Lucid Lynx_ - Release amd64 (20110211.1)/dists/lucid/main/binary-amd64/Packages.gz Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs Failed to fetch cdrom://Ubuntu 10.04.2 LTS _Lucid Lynx_ - Release amd64 (20110211.1)/dists/lucid/restricted/binary-amd64/Packages.gz Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs Failed to fetch http://ppa.launchpad.net/qwibber-daily/ppa/ubuntu/dists/lucid/main/binary-amd64/Packages.gz 404 Not Found How can I get rid of these errors? What is this error trying to tell me?

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  • ubuntu is not booting [duplicate]

    - by prasannajit
    This question already has an answer here: After update, get “error: file not found.” followed by “grub rescue> _” 5 answers last night i was trying to upgrade my ubuntu 12.04 to 12.10. every update was completed and finally when it asked for restart ,i restarted the system, then onwords it is not starting up showing message error:file not found. grub rescue> _ can any one plz help how to get rid of this problem. my system is dual os (windows 7 and ubuntu ) hp pavellion dv4 series

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  • Ubuntu 12.10 doesn't boot (installed with wubi)

    - by Luna Kiyiya
    Quick and simple, my ubuntu doesn't want to load after installing with ubuntu. Starting the computer, at the screen to choose your operative system, first shows an error that windows failed to start, and later asks me to choose between ubuntu and windows. If I choose ubuntu, the same error happens again and I return to the same screen. If I choose windows, windows just starts normally as it was doing before I installed it. How can I solve this?? Thank you for your attention... I really need some help :)

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  • Missing shared library for Rhythmbox

    - by user1450120
    After I upgraded from 13.04 to 13.10 my rhythmbox wouldn't work. After many failed attempts I ended up uninstalling and removing all traces of rhythmbox I could find. Now I've reinstalled rhythmbox, and am getting the error rhythmbox: error while loading shared libraries: librhythmbox-core.so.7: cannot open shared object file: No such file or directory I've tried sudo apt-get install librhythmbox* Only to get Reading package lists... Done Building dependency tree Reading state information... Done Note, selecting 'librhythmbox-core5' for regex 'librhythmbox*' Note, selecting 'librhythmbox-core6' for regex 'librhythmbox*' Note, selecting 'librhythmbox-core7' for regex 'librhythmbox*' librhythmbox-core7 is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded. Any ideas on how to get rhythmbox back to a working state?

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  • External 1TB WD USB 3.0 HDD is not detecting. Working perfectly find in Windows

    - by Yathi
    My 1TB USB 3.0 was working fine earlier in Ubuntu as well as Windows. But lately it is not at all being detected in Ubuntu. It still works fine in Windows. I did update my Ubuntu to 12.10 but I am not sure if that caused the issue. When I connect my HDD and run dmesg | tail: [ 47.804676] usb 4-3: >Device not responding to set address. [ 48.008575] usb 4-3: >Device not responding to set address. [ 48.212421] usb 4-3: >device not accepting address 9, error -71 [ 48.324451] usb 4-3: >Device not responding to set address. [ 48.528340] usb 4-3: >Device not responding to set address. [ 48.732165] usb 4-3: >device not accepting address 10, error -71 [ 48.844138] usb 4-3: >Device not responding to set address. [ 49.048179] usb 4-3: >Device not responding to set address. [ 49.251881] usb 4-3: >device not accepting address 11, error -71 [ 49.251907] hub 4-0:1.0: >unable to enumerate USB device on port 3 The output of sudo fdisk -l is : Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00030cde Device Boot Start End Blocks Id System /dev/sda1 2048 1332981759 666489856 83 Linux /dev/sda2 1332981760 1953523711 310270976 5 Extended /dev/sda5 1332983808 1349365759 8190976 82 Linux swap / Solaris /dev/sda6 1349367808 1953523711 302077952 7 HPFS/NTFS/exFAT Disk /dev/sdb: 120.0 GB, 120034123776 bytes 255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000a2519 Device Boot Start End Blocks Id System /dev/sdb1 * 2048 103368703 51683328 7 HPFS/NTFS/exFAT /dev/sdb2 103368704 154568703 25600000 83 Linux /dev/sdb3 154568704 234440703 39936000 7 HPFS/NTFS/exFAT /dev/sda and /dev/sdb are my 2 internal HDDs. But the external one which should be /dev/sdc is not even being shown though it is connected and the LED on the HDD is glowing. Someone had suggested adding blacklist uas to /etc/modprobe.d/blacklist.conf. Tried that as well. But still not working. Can someone help me out.

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  • no more network connection Ubuntu 12.04 Server

    - by gerpol
    Since yesterday my 12.04 web server refuses to connect to the Internet. Also when I boot I'm seeing the "waiting for network config" message. After logging in I'm getting an error about the packages. Error text: E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise-updates_universe_i18n_Translation-en, E:The package lists or status file could not be parsed or opened. This is a production web server so I really could use some help with enabling the network connection again.

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  • How to fix “Install-SPSolution: Admin SVC must be running in order to create deployment timer job”

    - by ybbest
    When I try to install a SharePoint Solution using PowerShell, I got the error “How to fix Install-SPSolution: Admin SVC must be running in order to create deployment timer job”. The reason you got error is that SharePoint 2010 Administration is not started, so to fix it you just need to start the services. Problem: Solution: To fix the issues, you need to start the SharePoint 2010 Administration service. 1. Go to services control panel. 2. Start the SharePoint 2010 Administration service. 3. Rerun your PowerShell, it should fix the problem. However, you might get another problem “A deployment or retraction is already under way for the solution “*.wsp”, and only one deployment or retraction at a time is supported”, for this problem you can check my other blog here.

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  • When Google gives up recrawling 301 that led to 404?

    - by Easy Life
    I've transferred a domain and made a mistake in the redirects (the URL structure is identical). Even though they went to the new domain, the error caused a 404 when crawled by Google bot. 10 days after I saw and corrected my redirect mistake, and now the site should (hopefully) redirect to proper pages. Q1: The URLs of the 404 pages in the Webmaster Tools all bear the mistake and will never be available at the new site. I marked them as fixed in the tools. Do I need to do something about that, like 301 rewrite them with a condition to fix the error? Q2: Does Google bot attempt to recrawl 301 pages that pointed to a 404?

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  • Unable to stop TOSHIBA TransMemory

    - by user66498
    I have a USB,when I choose safety remove, occur this error message.How to solve the problem? Unable to stop TOSHIBA TransMemory Error detaching: helper exited with exit code 1: Detaching device /dev/sdb USB device: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2) SYNCHRONIZE CACHE: synchronize cache(10): Fixed format, current; Sense key: Key=9 Additional sense: Logical unit not ready, cause not reportable Info fld=0x0 [0] FAILED: No such file or directory (Continuing despite SYNCHRONIZE CACHE failure.) STOP UNIT: start stop unit: transport: Host_status=0x07 [DID_ERROR] Driver_status=0x00 [DRIVER_OK, SUGGEST_OK] FAILED: No such file or directory

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  • I can't install kbibtex (KD4)

    - by kacikuama
    I have ubuntu 11.10 and am trying to install the latest version of kbibtex but I can't do it. Anyone know how to do? I downloaded the tar.bz2 file from KD4 page (http://home.gna.org/kbibtex/download.html), followed the instructions but I get the following error: ~/kbibtex-0.4-beta1/build$ cmake ../ -DCMAKE_INSTALL_PREFIX=home -DCMAKE_BUILD_TYPE=BUILD_TYPE && make -- The C compiler identification is GNU -- The CXX compiler identification is GNU -- Check for working C compiler: /usr/bin/gcc -- Check for working C compiler: /usr/bin/gcc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:91 (MESSAGE): Could NOT find Qt4 (missing: QT_QMAKE_EXECUTABLE QT_MOC_EXECUTABLE QT_RCC_EXECUTABLE QT_UIC_EXECUTABLE QT_INCLUDE_DIR QT_LIBRARY_DIR QT_QTCORE_LIBRARY) Call Stack (most recent call first): /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:252 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-2.8/Modules/FindQt4.cmake:1162 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:7 (find_package) -- Configuring incomplete, errors occurred! Someone can give me an idea of ??what's going on?

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  • Upgrade Ubuntu 10.04 to Ubuntu 10.10

    - by user8561
    Hi. I'm new to these forums so I'll be quick. When I try to upgrade to Ubuntu 10.10 from 10.04 I get this error, I have tried upgrading from Terminal and Update Manager as well. Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. Restoring original system state Thanks Aborting

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  • Drivers for GeForce 7300 GS?

    - by user1443346
    I have been searching EVERYWHERE!!!!! And I cannot seem to find a driver for my GeForce 7300 GS video card. If I don't get it, the Android SDK emulator won't work. I get this error while starting the emulator up: X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 154 (GLX) Minor opcode of failed request: 19 (X_GLXQueryServerString) Serial number of failed request: 12 Current serial number in output stream: 12 I looked up anything and everything, and the results I got was to get a video card driver, which I can not find. Any help is appreciated. Thanks!

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  • Update failing. Not enough space on /tmp

    - by KodeSeeker
    Im not being able to run update manager as I get the error saying that there is not enough free space in the /tmp directory. I've practically cleaned out the tmp directory but the error persists. Any help would be appreciated. here's df-h /dev/loop0 13G 11G 952M 92% / udev 2.0G 4.0K 2.0G 1% /dev tmpfs 785M 920K 784M 1% /run none 5.0M 0 5.0M 0% /run/lock none 2.0G 584K 2.0G 1% /run/shm /dev/sda6 20G 14G 6.4G 68% /host overflow 1.0M 16K 1008K 2% /tmp Thanks.

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  • Bluetooth RFCOMM / SDP connection to a RS232 adapter in android

    - by ThePosey
    Hello All, I am trying to use the Bluetooth Chat sample API app that google provides to connect to a bluetooth RS232 adapter hooked up to another device. Here is the app for reference: http://developer.android.com/resources/samples/BluetoothChat/index.html And here is the spec sheet for the RS232 connector just for reference: http://serialio.com/download/Docs/BlueSnap-guide-4.77_Commands.pdf Well the problem is that when I go to connect to the device with: mmSocket.connect(); (BluetoothSocket::connect()) I always get an IOException error thrown by the connect() method. When I do a toString on the exception I get "Service discovery failed". My question is mostly what are the cases that would cause an IOException to get thrown in the connect method? I know those are in the source somewhere but I don't know exactly how the java layer that you write apps in and the C/C++ layer that contains the actual stacks interface. I know that it uses the bluez bluetooth stack which is written in C/C++ but not sure how that ties into the java layer which is what I would think is throwing the exception. Any help on pointing me to where I can try to dissect this issue would be incredible. Also just to note I am able to pair with the RS232 adapter just fine but I am never able to actually connect. Here is the logcat output for more reference: I/ActivityManager( 1018): Displayed activity com.example.android.BluetoothChat/.DeviceListActivity: 326 ms (total 326 ms) E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) D/BluetoothChat( 1729): onActivityResult -1 D/BluetoothChatService( 1729): connect to: 00:06:66:03:0C:51 D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_CONNECTING E/BluetoothChat( 1729): + ON RESUME + I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_CONNECTING I/BluetoothChatService( 1729): BEGIN mConnectThread E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 I/BluetoothChatService( 1729): CONNECTION FAIL TOSTRING: java.io.IOException: Service discovery failed D/BluetoothChatService( 1729): setState() STATE_CONNECTING - STATE_LISTEN D/BluetoothChatService( 1729): start D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_LISTEN I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID I/NotificationService( 1018): enqueueToast pkg=com.example.android.BluetoothChat callback=android.app.ITransientNotification$Stub$Proxy@446327c8 duration=0 I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID The device I'm trying to connect to is the 00:06:66:03:0C:51 which I can scan for and apparently pair with just fine. The below is merged from a similar question which was successfully resolved by the selected answer here: How can one connect to an rfcomm device other than another phone in Android? The Android API provides examples of using listenUsingRfcommWithServiceRecord() to set up a socket and createRfcommSocketToServiceRecord() to connect to that socket. I'm trying to connect to an embedded device with a BlueSMiRF Gold chip. My working Python code (using the PyBluez library), which I'd like to port to Android, is as follows: sock = bluetooth.BluetoothSocket(proto=bluetooth.RFCOMM) sock.connect((device_addr, 1)) return sock.makefile() ...so the service to connect to is simply defined as channel 1, without any SDP lookup. As the only documented mechanism I see in the Android API does SDP lookup of a UUID, I'm slightly at a loss. Using "sdptool browse" from my Linux host comes up empty, so I surmise that the chip in question simply lacks SDP support.

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  • MVC2 and MVC Futures causing RedirectToAction issues

    - by Darragh
    I've been trying to get the strongly typed version of RedirectToAction from the MVC Futures project to work, but I've been getting no where. Below are the steps I've followed, and the errors I've encountered. Any help is much appreciated. I created a new MVC2 app and changed the About action on the HomeController to redirect to the Index page. Return RedirectToAction("Index") However, I wanted to use the strongly typed extensions, so I downloaded the MVC Futures from CodePlex and added a reference to Microsoft.Web.Mvc to my project. I addded the following "import" statement to the top of HomeContoller.vb Imports Microsoft.Web.Mvc I commented out the above RedirectToAction and added the following line: Return RedirectToAction(Of HomeController)(Function(c) c.Index()) So far, so good. However, I noticed if I uncomment out the first (non Generic) RedirectToAction, it was now causing the following compile error: Error 1 Overload resolution failed because no accessible 'RedirectToAction' can be called with these arguments: Extension method 'Public Function RedirectToAction(Of TController)(action As System.Linq.Expressions.Expression(Of System.Action(Of TController))) As System.Web.Mvc.RedirectToRouteResult' defined in 'Microsoft.Web.Mvc.ControllerExtensions': Data type(s) of the type parameter(s) cannot be inferred from these arguments. Specifying the data type(s) explicitly might correct this error. Extension method 'Public Function RedirectToAction(action As System.Linq.Expressions.Expression(Of System.Action(Of HomeController))) As System.Web.Mvc.RedirectToRouteResult' defined in 'Microsoft.Web.Mvc.ControllerExtensions': Value of type 'String' cannot be converted to 'System.Linq.Expressions.Expression(Of System.Action(Of mvc2test1.HomeController))'. Even though intelli-sense was showing 8 overloads (the original 6 non-generic overloads, plus the 2 new generic overloads from the Futures assembly), it seems when trying to complie the code, the compiler would only 'find' the 2 non-gneneric extension methods from the Futures assessmbly. I thought this might be an issue that I was using conflicting versions of the MVC2 assembly, and the futures assembly, so I added MvcDiaganotics.aspx from the Futures download to my project and everytyhing looked correct: ASP.NET MVC Assembly Information (System.Web.Mvc.dll) Assembly version: ASP.NET MVC 2 RTM (2.0.50217.0) Full name: System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Code base: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Web.Mvc/2.0.0.0__31bf3856ad364e35/System.Web.Mvc.dll Deployment: GAC-deployed ASP.NET MVC Futures Assembly Information (Microsoft.Web.Mvc.dll) Assembly version: ASP.NET MVC 2 RTM Futures (2.0.50217.0) Full name: Microsoft.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null Code base: file:///xxxx/bin/Microsoft.Web.Mvc.DLL Deployment: bin-deployed This is driving me crazy! Becuase I thought this might be some VB issue, I created a new MVC2 project using C# and tried the same as above. I added the following "using" statement to the top of HomeController.cs using Microsoft.Web.Mvc; This time, in the About action method, I could only manage to call the non-generic RedirectToAction by typing the full commmand as follows: return Microsoft.Web.Mvc.ControllerExtensions.RedirectToAction<HomeController>(this, c => c.Index()); Even though I had a "using" statement at the top of the class, if I tried to call the non-generic RedirectToAction as follows: return RedirectToAction<HomeController>(c => c.Index()); I would get the following compile error: Error 1 The non-generic method 'System.Web.Mvc.Controller.RedirectToAction(string)' cannot be used with type arguments What gives? It's not like I'm trying to do anything out of the ordinary. It's a simple vanilla MVC2 project with only a reference to the Futures assembly. I'm hoping that I've missed out something obvious, but I've been scratching my head for too long, so I figured I'd seek some assisstance. If anyone's managed to get this simple scenario working (in VB and/or C#) could they please let me know what, if anything, they did differently? Thanks!

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  • WCF timeouts are a nightmare

    - by Greg
    We have a bunch of WCF services that work almost all of the time, using various bindings, ports, max sizes, etc. The super-frustrating thing about WCF is that when it (rarely) fails, we are powerless to find out why it failed. Sometimes you will get a message that looks like this: System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '01:00:00'. --- System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. The problem is that the local socket timeout it's giving you is merely an attempt to be convenient. It may or may not be the cause of the problem. But OK, sometimes networks have issues. No big deal. We can retry or something. But here's the huge problem. On top of failing to tell you which precisely which timeout (if any) resulted in the failure ("your server-side receive timeout was exceeded," or something, would be helpful), WCF seems to have two types of timeouts. Timeout Type #1) A timeout, that, if increased, would increase the chance of your operation's success. So, the pertinent timeout is an hour, you are uploading a huge file that will take an hour and twenty minutes. It fails. You increase the timeout, it succeeds. I have no no problem with this type of timeout. Timeout Type #2) A timeout which merely defines how long you have to wait for the service to actually fail and give you an error, but modifying the value of this timeout has no impact on the chance of success. Basically, something happens during the first second of the service request which mucks things up. It will never recover. WCF doesn't magically retry the network connection for you. Fine, sometimes establishing a network connection doesn't go well. But, if your timeout is 2 hours, you have to wait 2 whole hours with no chance of it ever working before it finally acknowledges that it didn't work and gives you the error. But the error you see in both cases looks the same. With timeout Type #2, it still looks like you are running into a timeout. But, you could increase all of your timeouts to 4 years, and all it would do is make it take 4 years to get an error message. I know that Type #2 exists because I can do an operation that is known to complete in less than a minute when successful, and have it take 2 hours to fail. But, if I kill it and retry, it succeeds quickly. (If you are wondering why there might be a 2 hour timeout on an operation that takes less than a minute, there are times I run the operation with a much larger file and it could take over an hour.) So, to combat the problem with Type #2, you'd want your timeout to be really quick so you immediately know if there is a problem. Then you can retry. But the insurmountable problem is that because I don't know which timeouts are the cause of failure, I don't know what timeouts are Type #1 and which ones are Type #2. There may be one timeout (let's say the client-side send timeout) that acts like Type #1 in some cases and Type #2 in others. I have no idea, and I have no way of finding out. Does anyone know how to track down Type #2 timeouts so I can set them to low values without having to shorten actual (read: Type #1) timeouts and lower the chance of success? Thank you.

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  • Access, ADO & 64-bit

    - by JTeagle
    We have a large codebase that uses ADO under 32-bit, and we need to convert the code to 64-bit. We were using the Jet provider, but I know this is not supported under x64. We're importing definitions from msado15.dll. As of a while ago a 64-bit version of this DLL became available, but we are unable to get it to work. I have written a test program as follows (MFC, using the #imported DLL): map<CString, CString> mapResults ; _ConnectionPtr pConn = NULL ; CString strConn = _T("Provider=Microsoft.ACE.OLEDB.14.0;") _T("Data Source=c:\\program files\\our_company\\our_database.mdb;"); // (Above string only split for readability here.) CString strSQL = _T("SELECT * FROM [our_table] ORDER BY [our_field_1];"); try { pConn.CreateInstance(__uuidof(Connection) ); pConn->Open(_bstr_t(strConn), _bstr_t(_T("") ), _bstr_t(_T("") ), -1); _CommandPtr pCommand = NULL; pCommand.CreateInstance(__uuidof(Command) ); pCommand->CommandType = adCmdText ; pCommand->ActiveConnection = pConn ; pCommand->CommandText = _bstr_t(strSQL); _RecordsetPtr pRS = NULL ; pRS.CreateInstance(__uuidof(Recordset) ); pRS->CursorLocation = adUseClient ; pRS = pCommand->Execute(NULL, NULL, adCmdText); while (pRS->adoEOF != VARIANT_TRUE) { CString strField = (LPCTSTR)(_bstr_t)pRS->Fields->GetItem( (_bstr_t)_T("our_field_1") )->Value ; CString strValue = (LPCTSTR)(_bstr_t)pRS->Fields->GetItem( (_bstr_t)_T("our_field_2") )->Value ; mapResults[strField] = strValue ; pRS->MoveNext(); } } catch(_com_error &e) { CString strError ; strError.Format(_T("Error %08x: %s"),(int)e.Error(), e.ErrorMessage() ); mapResults[_T("COM error") ] = strError ; } Basically, the code will list the table if it succeeds, or list the COM error obtained if it fails. Obviously, we tested the code under 32 bit and got the desired results. On the 64-bit machine, the code explicitly imports from the known 64-bit version of msado15.dll (v6.1.7600.nnn). The machine has had the Office Data Providers (AccessDatabaseEngine_x64.exe) applied to get the new ACE drivers (ACEODBC.DLL, v14.nnn.nnn.nnn). If I look at Data Source under Administrator Tools (I know ODBC isn't the same as ADO, it was just to confirm the DLL was installed correctly), it shows the expected DLL. I can even confirm, using Process Explorer, that the version of msado15.dll it loads at run time (thus confirming that COM is finding the ADO dll) is the 64-bit version. I believe we have MDAC 2.8 installed (we have msado28.tlb in the same place as msado15.dll, but that might have been installed by AccessDatabaseEngine_x64.exe). The test machine is Windows 7 Ultimate, 64-bit. The test code was recompiled on that machine using VS2008 for x64 in full Release and run externally. And yet, we still get COM error 0x800a0e7a (Provider not found). Is there anything any one can suggest as to why this isn't working, or what further tests / checks I can perform to verify that I have all the right stuff on the machine (and thus, that it should work)? I know that ODBC will work under x64 (tried the test program using that) but rewriting our code base for ODBC would be undesirable!

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  • Assertion failure when trying to write (INSERT, UPDATE) to sqlite database on iPhone.

    - by Mark McFarlane
    I have a really frustrating error that I've spent hours looking at and cannot fix. I can get data from my db no problem with this code, but inserting or updating gives me these errors: *** Assertion failure in +[Functions db_insert_answer:question_type:score:], /Volumes/Xcode/Kanji/Classes/Functions.m:129 *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error inserting: db_insert_answer:question_type:score:' Here is the code I'm using: [Functions db_insert_answer:[[dict_question objectForKey:@"JISDec"] intValue] question_type:@"kanji_meaning" score:arc4random() % 100]; //update EF, Next_question, n here [Functions db_update_EF:[dict_question objectForKey:@"question"] EF:EF]; To call these functions: +(sqlite3_stmt *)db_query:(NSString *)queryText{ sqlite3 *database = [self get_db]; sqlite3_stmt *statement; NSLog(queryText); if (sqlite3_prepare_v2(database, [queryText UTF8String], -1, &statement, nil) == SQLITE_OK) { } else { NSLog(@"HMM, COULDNT RUN QUERY: %s\n", sqlite3_errmsg(database)); } sqlite3_close(database); return statement; } +(void)db_insert_answer:(int)obj_id question_type:(NSString *)question_type score:(int)score{ sqlite3 *database = [self get_db]; sqlite3_stmt *statement; char *errorMsg; char *update = "INSERT INTO Answers (obj_id, question_type, score, date) VALUES (?, ?, ?, DATE())"; if (sqlite3_prepare_v2(database, update, -1, &statement, nil) == SQLITE_OK) { sqlite3_bind_int(statement, 1, obj_id); sqlite3_bind_text(statement, 2, [question_type UTF8String], -1, NULL); sqlite3_bind_int(statement, 3, score); } if (sqlite3_step(statement) != SQLITE_DONE){ NSAssert1(0, @"Error inserting: %s", errorMsg); } sqlite3_finalize(statement); sqlite3_close(database); NSLog(@"Answer saved"); } +(void)db_update_EF:(NSString *)kanji EF:(int)EF{ sqlite3 *database = [self get_db]; sqlite3_stmt *statement; //NSLog(queryText); char *errorMsg; char *update = "UPDATE Kanji SET EF = ? WHERE Kanji = '?'"; if (sqlite3_prepare_v2(database, update, -1, &statement, nil) == SQLITE_OK) { sqlite3_bind_int(statement, 1, EF); sqlite3_bind_text(statement, 2, [kanji UTF8String], -1, NULL); } else { NSLog(@"HMM, COULDNT RUN QUERY: %s\n", sqlite3_errmsg(database)); } if (sqlite3_step(statement) != SQLITE_DONE){ NSAssert1(0, @"Error updating: %s", errorMsg); } sqlite3_finalize(statement); sqlite3_close(database); NSLog(@"Update saved"); } +(sqlite3 *)get_db{ sqlite3 *database; NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *copyFrom = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"/kanji_training.sqlite"]; if([fileManager fileExistsAtPath:[self dataFilePath]]) { //NSLog(@"DB FILE ALREADY EXISTS"); } else { [fileManager copyItemAtPath:copyFrom toPath:[self dataFilePath] error:nil]; NSLog(@"COPIED DB TO DOCUMENTS BECAUSE IT DIDNT EXIST: NEW INSTALL"); } if (sqlite3_open([[self dataFilePath] UTF8String], &database) != SQLITE_OK) { sqlite3_close(database); NSAssert(0, @"Failed to open database"); NSLog(@"FAILED TO OPEN DB"); } else { if([fileManager fileExistsAtPath:[self dataFilePath]]) { //NSLog(@"DB PATH:"); //NSLog([self dataFilePath]); } } return database; } + (NSString *)dataFilePath { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; return [documentsDirectory stringByAppendingPathComponent:@"kanji_training.sqlite"]; } I really can't work it out! Can anyone help me? Many thanks.

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  • Inconsistent responses from ISAPI DLL in mod_isapi.

    - by William Leader
    I have a ISAPI dll which I created with Delphi 2009, and I have been able to test that it functions as designed when I run it inside of IIS 5.1. However when I attempt to host the web service from within Apache on Windows XP using mod_isapi, I do not get consistent results. The ISAPI dll implements a very simple SOAP service with two methods. One method is a simple echo service that sends back the string sent to it. The second method is used to send a file to the server using a TSoapAttachement (Mutipart MIME). The interface can be descibes as follows IPdiSvc2 = interface(IInvokable) ['{532DCDD7-D66B-4D2C-924E-2F389D3E0A74}'] function Echo(data:string): string; stdcall; function SendFile(request:TFileDescription; attachment: TSOAPAttachment): TSendFileResponse; stdcall; end; What is interesting is if I only call the echo function Apache handles this without error every time. The webservice only returns an error after calling send File, but not every time. There are three outcomes to calling send file that I have observed: A normal result without an error (HTTP 200 OK). A Soap encoded exception with the message: 'Required white space was missing. Line: 11 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML.' (HTTP 500 Internal Error). This also generates a message in the Apache error.log 'Premature end of script headers: MYISAPI.dll' A Soap encoded exception with the message: 'Access violation at address 01A53D57 in module MYISAPI.dll. Read of address 00000000.' (HTTP 200 OK). What I find interesting is that the second third outcomes still occur if I call echo after calling send file. Calling SendFile, SendFile, SendFile, SendFile results in outcomes 1, 2, 3, 1. Calling Echo, SendFile, SendFile, SendFile results in outcomes 1, 1, 2, 3. Calling SendFile, Echo, Echo, SendFile results in outcomes 1, 2, 3, 1. The pattern I am seing is that after a Successful SendFile, the next to requests result in outcomes 2 and 3 regardless of what those two requests are. My guess is that because Apache uses multiple threads to handle multiple requests that each request is getting handled in a slightly different way, and that the DLL may not have been initialized in the same way for each worker thread. I do not think the problem exists in my code as when I attach the debugger to httpd.exe it does recognize the exceptions but it says the exceptions are in non-delphi code meaning that they are happening before the code inside my DLL has a chance to execute. I suspect it may have something to do with the way I have apache configured. My Apache configuration is the defaults created by the 2.2.15 installer for windows with the following addition: <IfModule isapi_module> AddHandler isapi-handler .dll ISAPILogNotSupported on ISAPIFakeAsync on ISAPIAppendLogToErrors on </IfModule> <IfModule alias_module> ScriptAlias /myisapi/ "C:/path/to/myisapi/" </IfModule> <Directory "C:/path/to/myisapi/"> AllowOverride None Options ExecCGI Order allow,deny Allow from all </Directory>

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