Hello, Did anyone have an issue with the latest M2 files? I just decided to try them out and upon trying to fire my first set of rules (which worked perfectly with M1 from 02/10/10), I get the following exceptions on this line: ksession.update(factHandle, myObject); Any ideas? java.lang.UnsupportedOperationException: LeftTupleSinkUpdateAdapter onlys supports assertLeftTuple method calls INFO|12572/0|10-05-12 15:20:50| at org.drools.reteoo.EvalConditionNode$LeftTupleSinkUpdateAdapter.retractLeftTuple(EvalConditionNode.java:460) INFO|12572/0|10-05-12 15:20:50| at org.drools.reteoo.ModifyPreviousTuples.retractTuples(ModifyPreviousTuples.java:101) INFO|12572/0|10-05-12 15:20:50| at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:177) INFO|12572/0|10-05-12 15:20:50| at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1389) INFO|12572/0|10-05-12 15:20:50| at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1285) INFO|12572/0|10-05-12 15:20:50| at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:248) INFO|12572/0|10-05-12 15:20:50| at com.medcpu.mpu.pp.engine.Drools.updateWorkingMemory(Drools.java:524) -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/5-1M2-Issue-LeftTuple... Sent from the Drools - User mailing list archive at Nabble.com.