Good afternoon How can I use retract in action or exception handler? For example, 0. I have a flow diagram; 1. in some node the fact Person( age == 10) is added to the working memory by 'insert'; 2. after some steps, the split node pass the control to the action-node 3. and in this action I need to retract this fact. How?! The action MVEL code like: $t : Person( age==10) retract($t) - does not work b/c of knowledge base errors: "Could not parse knowledge... " "Unable to build expression for action... " "java.lang.Class cannot be cast to org.mvel2.util.MethodStub : org.drools.lang.descr.ProcessDescr@fa54fe" Thanks, Eugene P -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/How-can-I-use-retract... Sent from the Drools - User mailing list archive at Nabble.com.