drools exception

[vaggaravi]

Hi

I got below drools exception when iam executing standalone java application(attached file).i was added org.apache.servicemix.bundles.drools-5.1.1_1 jar for drools

java.lang.NoSuchMethodError: org.drools.runtime.process.ProcessInstance.getProcess()Lorg/drools/definition/process/Process;

          at org.jbpm.process.workitem.wsht.AbstractHTWorkItemHandler.createTaskBasedOnWorkItemParams(AbstractHTWorkItemHandler.java:106)

          at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler.executeWorkItem(GenericHTWorkItemHandler.java:178)

          at org.drools.process.instance.impl.DefaultWorkItemManager.internalExecuteWorkItem(DefaultWorkItemManager.java:72)

          at org.drools.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:101)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:117)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:178)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:144)

          at org.drools.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:62)

          at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:58)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:117)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:178)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:144)

          at org.drools.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49)

          at org.drools.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41)

          at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:117)

          at org.drools.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:32)

          at org.drools.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:192)

          at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:309)

          at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1644)

          at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:306)

          at com.iton.humantask.HumanTaskExample.main(HumanTaskExample.java:42)