Add this after your last insertion: clock.advanceTime(1, TimeUnit.MILLISECONDS); I'm not sure why you have to do this, though. Perhaps it is a bug in Drools. -- View this message in context: http://drools.46999.n3.nabble.com/Event-Processing-in-Drools-tp4025029p4025161.html Sent from the Drools: User forum mailing list archive at Nabble.com.