Hello, I'm checking for condition ' field not matches ".*ABC.*" ` in my rule. when field value is null, rule does not fire. But if field value != null and != ABC, then rule fires. Is this expected output or bug? Please clarify. Thanks -- View this message in context: http://www.nabble.com/%22not-matches%27%27-not-working-when-string-is-nul... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users