Subject SV: [firebird-support] Unlock record
Author Svein Erling Tysvær
> May be I can modify or delete some record in any MON$ table or do some other thing?

I typically locate and delete records from MON$STATEMENTS. Mind you, that is 2.5 and typically when I have a long-running query. Don't know whether deleting from this table is possible or safe with 2.1 or sensible WITH LOCK.