Sorry for posting this question here but the jbpm forum has been down for a long time. I am interested in getting access through the api to the Input and Output parameters of a Human Task service in a process I see that this information lies in WorkItem if im not mistaken using getParameters() and getResults()   However how do I get access to the work item for a particular ProcessInstance pi? I tried the following   Collection<org.drools.runtime.process.NodeInstance> nodeInstances = ((RuleFlowProcessInstance)pInstance).getNodeInstances();  From the node instances i tried to get the Work item:  WorkItem workItem = nodeInstance.getWorkItem();  but got a NPE since it seems the InternalKnowledgeRuntime is null in WorkItemNodeInstance getWorkItem() Can anyone please help? Thank you,   Afshad Dinshaw afshadd(a)yahoo.com