[rules-users] Drools bug ?? (3.0.6)

I use Drools 3.0.6 and I get some NullPointerException when creating my facts: Exception in thread "main" org.drools.RuntimeDroolsException: java.lang.NullPointerException at org.drools.rule.EvalCondition.isAllowed(Unknown Source) at org.drools.reteoo.EvalConditionNode.assertTuple(Unknown Source) at org.drools.reteoo.TupleSource.propagateAssertTuple(Unknown Source) at org.drools.reteoo.JoinNode.assertObject(Unknown Source) at org.drools.reteoo.ObjectSource.propagateAssertObject(Unknown Source) at org.drools.reteoo.AlphaNode.assertObject(Unknown Source) at org.drools.reteoo.ObjectSource.propagateAssertObject(Unknown Source) at org.drools.reteoo.ObjectTypeNode.assertObject(Unknown Source) at org.drools.reteoo.Rete.assertObject(Unknown Source) at org.drools.reteoo.ReteooRuleBase.assertObject(Unknown Source) at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(Unknown Source) at org.drools.common.AbstractWorkingMemory.assertObject(Unknown Source) at org.drools.common.AbstractWorkingMemory.assertObject(Unknown Source) ... Caused by: java.lang.NullPointerException at org.sercho.shem.rules.Rule_Zeittest_0.eval0(Rule_Zeittest_0.java:25) at org.sercho.shem.rules.Rule_Zeittest_0Eval0Invoker.evaluate(Rule_Zeittest_0Eval0Invoker.java:19) ... 21 more The rule that is causing this goes like this: rule "Zeittest" when room : Room ( ) uhr : AlarmClock( applianceStateResource == ApplianceStateEnum.on, location == room, $alarmTime : alarmTime ) eval( $alarmTime.getHours() > 10 ) then ... If I omit the eval, ths error will not occur (and I can access $alarmTime.getHours() in RHS) I wonder if I do something wrong or if it is a Drools bug. Any hints ? -- View this message in context: http://www.nabble.com/Drools-bug----%283.0.6%29-tf3715030.html#a10392045 Sent from the drools - user mailing list archive at Nabble.com.