>When a table is corrupted, an error message "Not a table" or "Not a fox database" appears.
>How do I fix it? Can you suggest a good procedure for fixing my files?
>Thanks in advance!

See http://www.stonefield.com for their database toolkit. The also offer a PUTM product discount through the link at the top of the upper frame. There might also be some free utilities in the Files section here.

You can also make those error messages part of your error trapping routine. Then use your repair utility to automatically fix the tables [if they can be fixed].