Hi, I just tried to compile Yhi on Visual Studio 2005. It failed because it is missing libc.lib, which MS removed for this version. I managed to fake this by going to VC\lib and copying libcmt.lib and calling it libc.lib. I suspect the issue is that the copy of gmp we use explicitly asks for libc.lib, which breaks this. So a couple of questions: 1) Anyone know a version of gmp which will work with all VS versions? 2) Has anyone compiled Yhc with VS 2005 before? Thanks Neil