What to do with “The version of SOS does not match the version of CLR you are debugging” in WinDbg?

Question

I\'m having a problem with some of my apps. It\'s a wcf-based app running under IIS6 in Windows 2003 Server (x86):
In Event Log I get such an error from \"W3SVC-WP\" sou

Answer 1

This is what worked for me:

Download the following DLLs:

• clr.dll
• mscordacwks.dll
• SOS.dll

from this folder on the machine that generated the dump:

C:\Windows\Microsoft.NET\Framework64\v4.0.30319

Run the following command. The path to SOS.DLL should be without quotes, unescaped path delimiters:

.load path to downloaded SOS.DLL

I think a new WinDbg session is required for this to work.