>A customer reports that when he starts my application (.exe) Windows looks for a diskette in drive A: - this is not done by my app. Rebooting did nto help. I had him reinstall the app to a new folder as a test - the same behavior persists. Reinstalling the VFP runtimes did not help. Starting from a desktop icon or directly from the .exe file produces no change. Any help appreciated.

Maybe, the A:\ is in the msdos path (and your app does a File(SomeFile) )