Can anyone tell me what this means? It seems as though the fact is being updated elsewhere and is causing the fact handle to not be found, but I have no idea how to go about figuring that out. Is this even what this error message is trying to tell me? java.lang.NullPointerException org.drools.util.AbstractHashTable$EqualityEquals.hashCodeOf(AbstractHashTable.java:325) org.drools.util.ObjectHashMap.remove(ObjectHashMap.java:96) org.drools.reteoo.FromNode.retractTuple(FromNode.java:110) org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateRetractTuple(CompositeTupleSinkAdapter.java:83) org.drools.reteoo.LeftInputAdapterNode.retractObject(LeftInputAdapterNode.java:151) org.drools.reteoo.CompositeObjectSinkAdapter.propagateRetractObject(CompositeObjectSinkAdapter.java:375) org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:180) org.drools.reteoo.Rete.retractObject(Rete.java:214) org.drools.reteoo.ReteooRuleBase.retractObject(ReteooRuleBase.java:211) org.drools.reteoo.ReteooWorkingMemory.doRetract(ReteooWorkingMemory.java:79) org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1231) org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:96) com.kronos.webta.service.smarttime.rules.Rule_Schedule_Day_0.consequence(Rule_Schedule_Day_0.java:20) com.kronos.webta.service.smarttime.rules.Rule_Schedule_Day_0ConsequenceInvoker.evaluate(Rule_Schedule_Day_0ConsequenceInvoker.java:22)