>I have had very good success with preventing table corruption and data loss by adding FLUSH commands after any Fox command that updates table headers. We have not had any table corruption since.

We discussed that, but no one was sure whether that would update the server data, since TABLEUPDATE didn't do it. It was very difficult to reproduce the behavior and test it, so eventually I ended up just discreetly closing and reopening the primary tables in a few places, since there's no doubt at all that will get the update...