Hi Narong.

>> I developed application for Multi User..I have problem when open same reccord for 2 users..when last user close form ..have error message "Update conflict"..What is happend? I open database exclusive off. <<

This is exactly what I would expect to happend if two users try to update the same record. If you are using optimistic buffering, when the first user tries to save her changes, the tableupdate will succeed. When the second user tries to save her changes, tableupdate will fail.

You need to trap for error 1585 and take some action to reolve the conflict. You can also check out OLDVAL() and CURVAL() in the on-line help.

Marcia