I have a very simple test program that uses IBOQuery alike an IBOTable,
which uses Locate to either update a table row if it exists or append
to the same table if the row doesn't exists. No cached updates. Without
BSAfterInsert synchronization, the program will fail intermittently with a
' record not found' exception. If interested, I can forward the program
coding.
Added a button to turn the BSAfterInsert option on or off to assist in the
testing.

Best regards,
Hans