Hi,

When i am trying  to retreive the node name for particular process instance. I am getting following Error.

        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

Caused by: java.lang.NullPointerException

        at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:68)

        at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:181)

        at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.getNodeContainer(WorkflowProcessInstanceImpl.java:69)

        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.getNode(NodeInstanceImpl.java:103)

        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.getNodeName(NodeInstanceImpl.java:79)

  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

  at java.lang.reflect.Method.invoke(Method.java:597)

  at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:173)

  at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)

  at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:167)

  at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:94)

  at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)

  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)

  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)

  at java.util.concurrent.FutureTask.run(FutureTask.java:139)

  at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:38)

  at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:106)

  at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)

  at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:123)

  at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:207)

  at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:213)

  at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:154)

  at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:126)

  at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:186)

  at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:109)

  at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)

  at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:164)

  at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)

  at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)

  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)

  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:176)

below is the LOC, to get nodename

System.out.println(("Node name "+((org.jbpm.workflow.instance.WorkflowProcessInstance)instance).getNodeInstances().iterator().next().getNodeName()));