“LNK2022: metadata operation failed” driving me insane

Question

I have a big solution with lots of projects, using VS2008 SP1, and at least once a day I encounter the LNK2022 error. If I do a full rebuild of the solution it builds fine,

Answer 1

Try this in xxx.cpp and xxx2.cpp:

#ifndef _PROTECT_MY_HEADER
#define _PROTECT_MY_HEADER
#include  "inc.h"
#endif

#pragma once isn't enough to protect the header in this case.