Projects often become corrupted. Your only recourse at this point is to rebuild your project.

>My project file xxxxx.prt suddently has problem when I Build it. The error message is: Memo file c:\xxxx\xxxx.prt is missing or invalid.
>I am it is there, when I double click it, VFP 5.0 will open it as a project and it can run smoothly inside VFP, no error.
>How can I solve this problem so that I can build its exe file.