Does anyone know why this happens? Sometimes, when you click on the button to execute your compiled and built program, you get a message box saying that "One or more files do not exist", and it asks if you want to build them. Usually, these include the exe and several obj files. In fact, the files do exist in your temp or debug folders (wherever you have specified), as you can click "Cancel", and the program executes normally. It is as if the IDE seems to "forget" that the files are there. I don't know how to get around this...I even tried creating a new, empty workspace, and copying the source files into it, but the problem persists. Any ideas here? Is this a bug in the compiler/linker? [sig][/sig]