Re: [rules-users] NullPointerException @ modify()

OK... Did some digging in drools source code and found this: Line 151 in RightInputAdapterNode: // retrieve handle from memory final InternalFactHandle factHandle = (InternalFactHandle) memory.remove( tuple ); Tuple value: [fact 0:-1:0:1711615772:41:null] [fact 0:40:260358:2136057917:40:com.biperf.optumhealth.domain.Activity@7f51a83d] [fact 0:1:32722618:32722618:1:com.biperf.optumhealth.rules.ResultContext@1f34eba] WorkingMemory value: [fact 0:-1:0:1711615772:41:null] [fact 0:40:260358:2136057917:40:com.biperf.optumhealth.domain.Activity@7f51a83d] [fact 0:1:32722618:32722618:1:com.biperf.optumhealth.rules.ResultContext@1f34eba] After executing the above line, factHandle == null which causes the next line to throw a NullPointer: for ( RightTuple rightTuple = factHandle.getRightTuple(); rightTuple != null; rightTuple = (RightTuple) rightTuple.getHandleNext() ) { rightTuple.getRightTupleSink().retractRightTuple( rightTuple, context, workingMemory ); } Be happy to do some more digging given some direction.... -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/NullPointerException-... Sent from the Drools - User mailing list archive at Nabble.com.