Hi, There is a change done in Drools 5.1.0.M2 - org.drools.workflow.instance.node.WorkItemNodeInstance class in the method public void triggerCompleted(WorkItem workItem) at line 196 which is setting the workItemId as -1 this.workItemId = -1; Due to the above change the listeners which are attached to the "complete" event of the work item - such as the method below public void beforeNodeLeft(ProcessNodeLeftEvent event) are not able to get hold of the associated workitem object as it returns null. Is there any specific reason that workItemId is set to -1 even before the associated listeners get triggered or is this a bug? If it was an intended change then how do I get hold of the "WorkItem" object in the attached listeners. Thanks Vijay p.s This change was not there in the snapshot of 18th April 2010 which I was earlier working on. Above is the only change in this class from the snapshot of 18th April and 5.1.0.M2