Visual Studio warning about copies of files with different contents

Question

When I go to debug my C++ project in Visual Studio, up pops a little warning dialogue box that tells me:

A copy of datum.h was found in
c:/users/brad/desktop/sou         


        

Answer 1

Try removing breakpoints from the file in question. This worked for me when it occurred with Visual Studio 2013 for a header file in debug build. Source: Release mode file sync issue - current source code different from the version built

Additional notes: Clean / Rebuild also works, but that is painful for regularly changing code. Enabling the break point after starting debugger merely delays the message.