>>Copying the files is not a good idea. You will get unpredicatable results.
>
>If it doesn't make sense. Any advice to solve these "UNPREDICTABLE RESULTS". How can we prevent this problem.

Yep - create a runtime distribution using Setup Wizard. There are more files involved in the VFP runtime environment than just the VFP*.DLL dfiles, and with Win2K, you can't just copy files into a system directory IAC. VFP provides you with a simple menchanism to ensuire that the base runtime files are included and installed properly in Setup Wizard.