>>>It does run from different folders using entirely seperate files. I still get the message.
>
>> Could it happen, that you included Config.fpw in executable? It's not a good idea and can produce similar problems.
>
>
>Config.fpw isn't included in the .exe. Neither is foxuser.dbf. Foxtools is though. Any other ideas. I'm at a loss on this.

It's really strange. You could try to SET RESOURCE explicitly, and moreover using different file names, i.e. renaming foxuser.dbf files.