>>If I remember correctly, we had something like that recently when the file was infected with a virus.
>
>That was my first Impression but I email them a new copy of the EXE file with the same result. To mi knowledge viruses does not corrupt vfp data files and since all the clases and reports are included on the EXE I have no clue ,
>
>Cloud the VFP runtime libraries be corrupted?

In our case the .EXE was infected. When we placed a new exe on there it was infected in a matter of seconds. We could check with the modification dates. We had to determine the source of the virus (not on the server itself, but a workstation that infected the files through a share) before we could resolve the problem.