try deleting the exe file and re compiling. I have encountered same problem in vfp in win95.

I tried to run an .EXE file that I had built(VFP 3.0 in Win 3.11).
>It showed "Invalid or missing .EXE file". I check VFP error messages,
>it says the .EXE file may be corrupted or missing. I re-built the EXE
>file, but still having same error message. Anyone pls help, thank you...
>
>Rgds, /alvin :-(