CODEWITHSUNDEEP
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Pavel Tupitsyn
Pavel Tupitsyn

Reputation: 8986

WinDbg x86 .NET 4 application on Windows 7 x64: Failed to load data access DLL, 0x80004005

I'm trying to debug .NET 4 32-bit (explicitly set in project options) application with WinDbg on Windows 7 x64, here are the steps:

After that I get this:

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 clr.dll is 
                in the version directory
            3) or, if you are debugging a dump file, verify that the file 
                mscordacwks_<arch>_<arch>_<version>.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.

What is wrong? I've searched a lot.. this question looks to be about memory dump: Failed to load data access DLL, 0x80004005 But I'm trying to debug a running application.

Upvotes: 2

Views: 917

Answers (2)

Brian Rasmussen
Brian Rasmussen

Reputation: 116401

The DAC is the layer that SOS uses to talk to the managed runtime. If the correct version cannot be located for some reason (or if your debugger is outdated), you'll see this message. If you do a .cordll -ve -u -l, you get more information about what version it is trying to load and you should be able to troubleshoot from there.

Upvotes: 3

Pavel Tupitsyn
Pavel Tupitsyn

Reputation: 8986

Finally I've used Visual Studio Immediate Window instead of WinDbg to do call SOS functions (dumpheap and so on): http://msdn.microsoft.com/en-us/library/bb190764.aspx

Upvotes: 2

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