WinDbg fails to find symbol file reporting 'unrecognized OMF sig'

Posted by sean e on Stack Overflow See other posts from Stack Overflow or by sean e
Published on 2010-05-01T23:52:10Z Indexed on 2010/05/01 23:57 UTC
Read the original article Hit count: 468

Filed under:

WinDbg

|

64bit

|

x64

|

windows-7-x64

|

Windows

I have received a 64bit dump of a 32bit app that was running on Win7 x64. I am able to load it in WinDbg (hint: !wow64exts.sw) running on a 64bit OS. The symbols for most of my dlls are loaded properly. The pdb for one though does not load. The same pdb does load properly for the same dll when reading a 32bit dump on a different system. I've also confirmed that the dll and pdb match each other via the chkmatch utility.

I tried .symopt +40 but the pdb still didn't load.

I did !sym noisy then .reload - WinDbg reported:

DBGHELP: unrecognized OMF sig: 811f1121
*** ERROR: Symbol file could not be found.  Defaulted to export symbols

Any ideas on what to try to get WinDbg to load my pdb when reading a 64bit dump?

© Stack Overflow or respective owner

Related posts about WinDbg

WinDbg .for loop

as seen on Stack Overflow - Search for 'Stack Overflow'
I am having trouble getting the WinDbg .for command to work. I would like to dump an array of c++ structs. ?? gpTranData->mpApplCodes[0] works for a single entry but I would like to loop through n of these. .for ($t0=0;$t0<(gpTranData->miApplCodeCount);$t0++){ ?? &gpTranData->mpApplCodes[$t0]… >>> More
How to break WinDbg in an anonymous method?

as seen on Stack Overflow - Search for 'Stack Overflow'
Title kinda says it all. The usual SOS command !bpmd doesn't do a lot of good without a name. Some ideas I had: dump every method, then use !bpmd -md when you find the corresponding MethodDesc not practical in real world usage, from what I can tell. Even if I wrote a macro to limit the dump… >>> More
Comparing two Object addresses in WinDbg

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there a way to know if two addresses, which are references to two objects are connected ? By connected I mean whether one of the objects holds a reference to the other object. >>> More
WinDbg remote debugger protocol

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to build a client for dbgsrv.exe. I'd like to know if there's a spec on the protocol that it uses and if there are any (open source?) libraries that are able to communicate with it for a remote debugging session. >>> More
Silverlight SOS (Son of Strike) documenation

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there any microsoft or even non-official documentation for SOS for Silverlight. Other than a few web posts I have seen zero documentation for it on MSDN. Even official documentation for the CLR version of SOS seems hard to find, this ancient article mentions a sos.htm file that is included in… >>> More

Related posts about 64bit

How do I install Geomatica?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I wanted to try the latest version(trial) of Geomatica, Geomatica 2012 on Ubuntu 11.10 beta. When I tried to run the bin file I got a whole list of dependencies. It also seems that it is a RPM package. Instead of going through each entry manually, is there any easy way to search and install a list… >>> More
Java 64bit install throwing non compatible 64bit error in 64bit Windows 7

as seen on Stack Overflow - Search for 'Stack Overflow'
JRE and JDK 64bit install executable are throwing a non compatible win32 error: jre_7u1_windows-x64bit.exe is not a valid Win32 application. I thought this could be a system environment variable problem, but from what I can tell it is not, the variable PROCESSOR_ARCHITECTURE is set as: AMD64 and… >>> More
ColdFusion 9 64bit / MAMP Pro 1.9 64Bit on OSX

as seen on Server Fault - Search for 'Server Fault'
I followed this thread and it's associated links. But there is nothing i can do to get CF9 to work. MAMP Pro now has the 64bit version of apache 2.2. Whenever i start apache i get an error saying it couldn't start and to check the logs. i check the logs and this is what i see. 6/1/10 12:39:12 PM… >>> More
Using Toad with 64bit Oracle Client and Windows 7 64bit Operating System

as seen on Stack Overflow - Search for 'Stack Overflow'
After downloading the latest version of Toad for Windows 7 64bit, I am struggling to get it to connect to the database using the existing full Oracle Client that is already on the desktop. The Oracle Client that is there is a 64bit version and is version 12c. When running Toad it says that there is… >>> More
how to find if the machine is 32bit or 64bit

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there anyway from a C prog to find whether the OS is currently running in 32bit or 64bit mode. I am using a simple program as below int main(void){ switch(sizeof(void*)){ case 4: printf("32\n"); break; case 8: printf("64\n"); break; } } Is this a correct… >>> More