Sorry, I didn't want to blame you. I have to agree. Your query works, I have just run it. But eclipse shows the error given above. Probably, I have some problems with environment. -- View this message in context: http://drools.46999.n3.nabble.com/facts-custom-sort-tp3538410p3552224.html Sent from the Drools: User forum mailing list archive at Nabble.com.