[rules-users] class Cast Exception when using OR (||) - Bug?

When I define a rule: When cntct:Contact (initialized==true) exr:Relation( contact==cntct, active:active==$1, relationName=="Old") Then contact.getStatus().setStatus(true); contact.getStatus().addToReasonTrace(drools.getRule().getName()); end ..The bove works. BUT, when I do the following: When cntct:Contact (initialized==true) exr:Relation( contact==cntct, active:active==$1, relationName=="Old") || Relation( contact==cntct, active:active==$1, relationName==null) Then contact.getStatus().setStatus(true); contact.getStatus().addToReasonTrace(drools.getRule().getName()); end ... The script compiles anda stateless Session is created successfully, but at runtime/execution it fails with the exception: java.lang.ClassCastException: com.arjun.brms.businessObjects.Contact org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:75) org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:141) org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple (SingleTupleSinkAdapter.java:20) org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:120) org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple (SingleTupleSinkAdapter.java:20) org.drools.reteoo.JoinNode.assertObject(JoinNode.java:162) org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject (CompositeObjectSinkAdapter.java:317) org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130) org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject (CompositeObjectSinkAdapter.java:308) org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130) org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject (CompositeObjectSinkAdapter.java:308) org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168) org.drools.reteoo.Rete.assertObject(Rete.java:168) org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190) org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:848) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822) org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623) Class diagram: ~~~~~~~~~~~~~~~~ Contact<-- bi-directional association -->List<Relation> Please advise! is this a bug? thanks, Arjun