>I tested 3 and 5 and it seems to not make a difference. The other thought was whether it matters performance wise or not if it is 3 or 5 (does VFP somehow have to scan all rows for changes if it is a 5?).

That depends on the 1st parameter in tableupdate() - check to see what your framework uses there. It may go one record at a time so it can check each record (postsave etc) or do them all at once and then get recno()s (of those causing an error) in an array (last parameter of tableupdate()) or it may not even care. Look under the hood.