>>The latest version is 07.00.0000.9465 for Vfp7r.dll and Vfp7renu.dll.
> I checked the client machine and these dll's are installed and they have the correct version and date.
> Must be some other strange thing going on--any ideas?

What about computers where application runs w/problem. Do they have the same dll version? What they have in common the other don't?