Me and some colleagues of mine recently all stumbled over the following error when analyzing .NET minidumps:
I opened a the minidump and typed !CLRStack. What I got was:
Failed to load data access DLL, 0x80004005
Verify that 1) you have a recent build of the debugger (6.2.14 or newer)
2) the file mscordacwks.dll that matches your version of mscorwks.dll is
in the version directory
3) or, if you are debugging a dump file, verify that the file
mscordacwks___.dll is on your symbol path.
4) you are debugging on the same architecture as the dump file.
For example, an IA64 dump file must be debugged on an IA64
machine.
You can also run the debugger command .cordll to control the debugger's
load of mscordacwks.dll. .cordll -ve -u -l will do a verbose reload.
If that succeeds, the SOS command should work on retry.
If you are debugging a minidump, you need to make sure that your executable
path is pointing to mscorwks.dll as well.
OK, so I followed the step 1 through 4...
ad 1) I'm using version 6.7.5.0 for good reasons
ad 2) Don't know what that means...
ad 3) Why should a dll be in my symbol path?!?
ad 4) The architecture is x86_32 on both machines
So I tried .cordll -ve -u -l
0:000> .cordll -ve -u -l
CLRDLL: Unknown processor type in image C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
CLR DLL status: No load attempts
The following sentence finally helped me:
If you are debugging a minidump, you need to make sure that your executable
path is pointing to mscorwks.dll as well.
So I executed:
0:000> lmv m mscorwks
start end module name
79e70000 7a3d6000 mscorwks T (pdb symbols) C:\windbg\symbols\mscorwks.pdb\6D3E0DE91A284256A48A60718DC9CDEB2\mscorwks.pdb
Loaded symbol image file: mscorwks.dll
Image path: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
Image name: mscorwks.dll
Timestamp: Fri Apr 13 09:15:54 2007 (461F2E2A)
CheckSum: 005635C7
ImageSize: 00566000
File version: 2.0.50727.832
Product version: 2.0.50727.832
File flags: 0 (Mask 3F)
File OS: 4 Unknown Win32
File type: 2.0 Dll
File date: 00000000.00000000
Translations: 0000.04b0 0000.04e0 0409.04b0 0409.04e0
And...
0:000> .exepath+ C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\
Finally...
0:000> .reload
...................................................................................................................................................................................................................................................
CLRDLL: Loaded DLL C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscordacwks.dll
And my !CLRStack worked ;-)