NCB is the Intellisense Database. This sometimes messes up BADLY. I have had a NCB-File with a size of 1.2 GB (!!!). Sometimes the Parser will get a hick-up and go crazy. Just delete the file, it's automatically recreated when you reload your project. Looking stuff up (code completion etc.) might be a bit slow, but will soon get back to its old self. The PCH-File is the precompiled header file. You can delete that one as well, it also will be recreated. If it is not there, compiling might take a bit longer (because it has to be recreated). If you do not need recompiled headers, turn them off in the project properties. Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.