Hi all, I've just updated to drools 5.0CR1. Before I had this kind of expression: ksession.executeIterable(objects) with objects ist a list containing different kind of objects and this worked perfectly. after updating, I use the forementioned execute(Iterable obj) on the same list of objects, but I got the class cast exception: 12:13:18,718 INFO [STDOUT] [] [2009:03:72 12:03:718:info] KnowledgeAgent new KnowledgeBase now built and in use 12:13:19,156 ERROR [myClass.Interceptor] [] org.drools.base.mvel.MVELEvalExpression@14e4952 : java.lang.ClassCastException: java.lang.Integer org.drools.RuntimeDroolsException: org.drools.base.mvel.MVELEvalExpression@14e4952 : java.lang.ClassCastException: java.lang.Integer at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:122) at org.drools.reteoo.EvalConditionNode.assertLeftTuple(EvalConditionNode.java:180) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:34) at org.drools.reteoo.EvalConditionNode.assertLeftTuple(EvalConditionNode.java:189) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:28) at org.drools.reteoo.FromNode.evaluateAndPropagate(FromNode.java:156) Could this be a problem from mvel or is it eventually my code that causes this? (no changed on my code has been made before) many thanks for hints Regards -- View this message in context: http://www.nabble.com/ClassCastException-with-5.0CR1-on-execute%28Iterabl... Sent from the drools - user mailing list archive at Nabble.com.