I am compiling an MFC DLL project using Visual C++ 6.0. It compiles and Links fine in Release mode. However, If compiling in Debug mode, when it tries to link, I get the fatal error: "LNK1104 cannot open file '/Debug/Gp.dll'". MSDN help suggested a few things that could be the problem: low on disk space, the file does not exist, wrong filename or path, drive is invalid etc. None of these appear to be the problem. Also I've checked PView.exe and Task Manager to make sure the DLL is not still running somewhere. I'm stuck, not being able to link in debug mode for I need to debug a problem in the code.