How to get the PDB file for mscorlib.ni.lib (.Net Framework 3.5)

Question

After doing a lot of search, I still couldn\'t get the solution for the question.

I have a mdmp file. The call stack shows it is using mscorlib.ni.dll. So to get the

Answer 1

I had the same error message until I realized I call ngen.exe from the Framework64 folder. Apparently, the mscorlib.ni.dll was not 64-bit.

So I used the 32-bit version of ngen.exe from the folder C:\Windows\Microsoft.NET\Framework\v4.0.30319 and it successfully produced the PDB.

However, the path to your mscorlib.ni.dll includes ...\NativeImages_v2.0.507 7_64\..., which indicates it is 64-bit, so this might be a different issue.

Answer 2

Like the answer from Monsignor, for me the solution was to match the bit-ness (64-bit or 32-bit). My minidump was 64-bit so I had to go to the Framework64 folder and run ngen from there and it was fine. I originally got the same ngen error as described here (Invalid header found in native image...E_FAIL) because I was in the Framework folder instead of the Framework64 folder (facepalm).

However, even though the ngen command worked...the pdb that was generated ultimately was still not accepted by VS 2013 as a matching symbol file, in my scenario.