I'm not a Dev-C++ programmer but the problem may be within the searching of binary directories. It's a very strange problem. i.e., mingw32-make.exe makes references to binaries like 'rm.exe'; those files can be found in 'C:\Mingw32\MSYS\1.0\' the 'mingw32-make.exe' can be found in 'C:\Mingw32\bin\'. Normally you would add those two directories to your Binary Directories list. If 'c:\Mingw32\bin\' is first in the order the IDE ignores the rest of the directories, specifically when doing a rebuild....