I have a vfp program which uses about 30 files - when run it brings up an error index does not match file

When I connect into this machine remotely via Logmein and run the program I do not get the error and the program runs ok

When I run this program on another machine at the same site I do not get the error and the program runs ok

How can I find out which file the system is referring to - I would guess its referring to a file on the c: drive hence it runs on other machines but why is it OK when I run it remotely?

Has anyone heard of a fault like this before?