I believe, somewhere in the program you have "set class to' or 'set program to' and they are not released properly in the program.

* your message below
>I am working in vfp6.0/SP4.0 on a Win98 Dell Machine. My problem is
>that when I run a vfp compiled Program and run it from my
>machine and try to compile it again I get a error message saying I can not create the file. For some strange reason my machine wont release the previously run program. Any Ideas?
>Thanks.

I've actually encountered the same issue with SP3 on win 98. Hmmm.