Hello ! My problem is that the 2 methods getStartTimestamp() and getEndTimestamp() give me the same value I don't know why (the duration of any event is 0 !!) Thank you very much :) -- View this message in context: http://drools.46999.n3.nabble.com/getStartTimestamp-and-getEndTimestamp-g... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users