[rules-users] org.drools.RuntimeDroolsException

Folks, Using 4.0.1 with stateful session. Getting this org.drools.RuntimeDroolsException when inserting an object. Any idea why? Thanks, -Sergey --- org.drools.RuntimeDroolsException Exception executing predicate org.drools.base.mvel.MVELPredicateExpression@31c2fd64 Stack Trace: org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:1 97) org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:122) org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(Compo siteObjectSinkAdapter.java:317) org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:160) org.drools.reteoo.Rete.assertObject(Rete.java:176) org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196) org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java: 70) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav a:854) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav a:826) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav a:627) ********************** ** LEGAL DISCLAIMER ** ********************** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer.