This is Classic, so yes, automatic sweep is disabled. My understanding is that gbak does a sweep while doing a backup, which happens nightly, so sweep should be happening then (if I understand it correctly that is). Also, running a manual sweep hangs indefinitely.
As for the active transaction, restarting Firebird doesn't fix the problem. The ONLY thing that fixes the problem is restoring from a backup file to create a fresh file. According to Sinatica, there are no active transactions while the problem is being exhibited. I will check the raw MON tables, but would restarting the Firebird service not terminate any active transactions? Thanks for all the quick responses! Ryan