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java.lang.NullPointerException: 	at com.bea.wlpi.server.workflow.action.ActionBusinessOperation.execute(ActionBusinessOperation.java:162)	at com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.executeActions(WorkflowProcessorBean.java:1154)	at com.bea.wlpi.server.workflow.Task.executeActions(Task.java:119)	at com.bea.wlpi.server.workflow.Task.doit(Task.java:159)	at com.bea.wlpi.server.workflow.Workflow.taskDoit(Workflow.java:486)	at com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean$2.invoke(WorkflowProcessorBean.java:734)	at com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.performWithErrorHandling(WorkflowProcessorBean.java:1103)	at com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.taskDoit(WorkflowProcessorBean.java:729)	at com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBeanEOImpl.taskDoit(WorkflowProcessorBeanEOImpl.java:331)	at com.bea.wlpi.server.worklist.WorklistBean.taskExecute(WorklistBean.java:356)	at com.bea.wlpi.server.worklist.WorklistBeanEOImpl.taskExecute(WorklistBeanEOImpl.java:151)	at com.bea.wlpi.server.worklist.WorklistBeanEOImpl_WLSkel.invoke(WorklistBeanEOImpl_WLSkel.java:226)	at weblogic.rmi.extensions.BasicServerObjectAdapter.invoke(BasicServerObjectAdapter.java:347)	at weblogic.rmi.extensions.BasicRequestHandler.handleRequest(BasicRequestHandler.java:77)	at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:15)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)