Rajesh P [https://community.jboss.org/people/javalearner] created the discussion "Kindly help me in passing processVariables when Human Task completed." To view the discussion, visit: https://community.jboss.org/message/817191#817191 -------------------------------------------------------------- Hi All, Please some one give light on this problem. I am sstruggling to resolve this issue from last 2 days. I am using JBPM 5.4.0 final with Spring 3.0 MVC and Hibernate 3. I followed the configuration given in https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web link. Actually when i passing the values to processVariales while human task is going to completed, i am getting null values inside of the script task after the human task.(Please find the attached BPMN file). The code i am using to complete the Human task is, long taskId = unlockRequestVO.getRequestID(); humanTaskEngine.startTask(taskId,unlockRequestVO.getUser()); Map<String, Object> results = new HashMap<String,Object>();                     results.put("muRequest",unlockRequestVO);                     if(unlockRequestVO.getTaskStatus().equals("approve"))                     results.put("isApproved",true);                     else                               results.put("isApproved", false); humanTaskEngine.completeWithResults(taskId, user, results); I have used the approach mentioned in the thread https://community.jboss.org/thread/220416 https://community.jboss.org/thread/220416 But no use. Please let me where am i doing wrong? :-/ Please let me know if any information is required. java.lang.RuntimeException: Constraints must return boolean values: null for expression           at org.jbpm.process.instance.impl.ReturnValueConstraintEvaluator.evaluate(ReturnValueConstraintEvaluator.java:136)           at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:72)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238)           at org.jbpm.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:55)           at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:51)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238)           at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)           at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:216)           at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:196)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:247)           at org.jbpm.workflow.instance.node.HumanTaskNodeInstance.triggerCompleted(HumanTaskNodeInstance.java:90)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemAborted(WorkItemNodeInstance.java:301)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:287)           at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:342)           at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.abortWorkItem(JPAWorkItemManager.java:154)           at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:56)           at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:29)           at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)           at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:373)           at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.abortWorkItem(CommandBasedStatefulKnowledgeSession.java:156)           at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:276)           at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.execute(GenericHTWorkItemHandler.java:234)           at org.jbpm.task.service.local.LocalTaskService$SimpleEventTransport.trigger(LocalTaskService.java:329)           at org.jbpm.task.event.MessagingTaskEventListener.triggerPayload(MessagingTaskEventListener.java:76)           at org.jbpm.task.event.MessagingTaskEventListener.handleEvent(MessagingTaskEventListener.java:92)           at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:109)           at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:49)           at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:569)           at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:495)           at org.jbpm.task.service.local.LocalTaskService.complete(LocalTaskService.java:83)           at org.jbpm.task.service.local.LocalTaskService.completeWithResults(LocalTaskService.java:91)           at com.honeywell.hses.workflow.WorkFlowService.approveOrReject(WorkFlowService.java:121)           at com.honeywell.hses.workflow.WorkFlowService$$FastClassByCGLIB$$aec4f2ca.invoke(<generated>)           at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)           at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)           at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)           at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)           at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)           at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)           at com.honeywell.hses.workflow.WorkFlowService$$EnhancerByCGLIB$$ec946839.approveOrReject(<generated>)           at com.honeywell.hses.workflow.WorkFlowProvider.approveOrRejectRequest(WorkFlowProvider.java:42)           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)           at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)           at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)           at java.lang.reflect.Method.invoke(Unknown Source)           at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)           at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)           at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)           at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)           at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)           at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)           at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)           at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)           at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)           at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)           at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)           at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)           at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)           at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter.doFilter(AbstractPreAuthenticatedProcessingFilter.java:88)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)           at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)           at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)           at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)           at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)           at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)           at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)           at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)           at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)           at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)           at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)           at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)           at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)           at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)           at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)           at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)           at java.lang.Thread.run(Unknown Source) org.springframework.web.client.HttpServerErrorException: 500 Internal Server Error           at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:92)           at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:494)           at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:451)           at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:409)           at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:385)           at com.honeywell.hses.controller.MetricController.getRestServiceResult(MetricController.java:363)           at com.honeywell.hses.controller.MetricController.approveOrRejectRequest(MetricController.java:457)           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)           at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)           at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)           at java.lang.reflect.Method.invoke(Unknown Source)           at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)           at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)           at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)           at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)           at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)           at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)           at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)           at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)           at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)           at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)           at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)           at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)           at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)           at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)           at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)           at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)           at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)           at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)           at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)           at java.lang.Thread.run(Unknown Source) Thanks in advance. Rajesh, -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/817191#817191] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]