>An application which runs fine on a machine with VFP installed, terminates with a fatal error on one that doesn't, the actual application performs ok until it terminates. All the program does is scan a table, calculate balances and write them to a new table then return

You mean just a GPF with no other error message? Is there an error handler? If so, and you still get the crash, that's a tough one, and I've never seen it...I guess I'd resort to something like installing vfp temporarily on the bad machine and run app in vfp to debug it, then uninstall vfp...