Hi All, I have a simple CEP test case which I am working through. I am currently getting a NullPointerException in the Consequence and have no idea why. *Rule: **rule* "Param Update Event Rule" *when* $pue : ParameterUpdateEvent(name == "testParam2", $param : param) *from* entry-point "ParamUpdateStream" *then* #System.out.println("Param '" + $pue.getName() + "' has been updated to " + $pue.getValue()); System.out.println("HERE!!! " + $param + " " + $param.name()); *End* * * *Exception & Debug:* OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109factId: 2 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109factId: 2 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3 ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) Exception in thread "Thread-3" BEFORE ACTIVATION FIRED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId: 4 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId: -1 *org.drools.runtime.rule.ConsequenceException*: * java.lang.NullPointerException* at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException( *DefaultConsequenceExceptionHandler.java:23*) at org.drools.common.DefaultAgenda.fireActivation(* DefaultAgenda.java:943*) at org.drools.common.DefaultAgenda.fireNextItem(* DefaultAgenda.java:885*) at org.drools.common.DefaultAgenda.fireUntilHalt(* DefaultAgenda.java:1065*) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(* AbstractWorkingMemory.java:701*) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(* AbstractWorkingMemory.java:678*) at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(* StatefulKnowledgeSessionImpl.java:195*) at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(* SessionRunner.java:13*) at java.lang.Thread.run(Unknown Source) Caused by: *java.lang.NullPointerException* at org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$getParam.getValue(Unknown Source) at org.drools.base.ClassFieldReader.getValue(* ClassFieldReader.java:91*) at org.drools.rule.Declaration.getValue(*Declaration.java:244*) at ie.PocketKings.SystemsManagement.Alerting.Rule_Param_Update_Event_Rule_0ConsequenceInvoker.evaluate( *Rule_Param_Update_Event_Rule_0ConsequenceInvoker.java:16*) at org.drools.common.DefaultAgenda.fireActivation(* DefaultAgenda.java:934*) ... 7 more OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19fdbcbfactId: 5 Could it be that my Event object is getting destroyed before the consequence is run, is that what “OBJECT RETRACKED” means in this case? Thanks Glenn _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users