prashanth Reddy Dundigal [https://community.jboss.org/people/prashanth_biomorf] created the discussion "org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager, Caused by: org.jbpm.workflow.instance.WorkflowRuntimeException: -- argument type mismatch" To view the discussion, visit: https://community.jboss.org/message/755045#755045 -------------------------------------------------------------- Sai, The service task properties are declared in this way : | Id | 3 | | Interface | org.jbpm.biomorf.sample.demo.EvenOddNumberCheckServiceImpl | | MetaData | {height=53, width=99, UniqueId=_9-3, y=121, x=129} | | Name | CheckEvenOdd | | On Entry Actions | [System.out.println(" entering into service task ");] | | On Exit Actions | [System.out.println("exiting service task");] | | Operation | checkEvenOrOdd | | Parameter | | | Parameter Mapping | {Parameter=inputNumber} | | ParameterType | java.lang.String | | Result Mapping | {Result=inputNumber} | Can anyone please see the below error and let us know what to do... We are not able to run the service task inside an Adhoc-sub-Process.  When run the task, I get the following error : org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction@1080876           at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:979)           at org.drools.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:866)           at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:90)           at org.jbpm.process.instance.ProcessRuntimeImpl.signalEvent(ProcessRuntimeImpl.java:372)           at org.drools.impl.StatefulKnowledgeSessionImpl.signalEvent(StatefulKnowledgeSessionImpl.java:341)           at org.jbpm.biomorf.sample.demo.NumberProcessTest.main(NumberProcessTest.java:108) Caused by: org.jbpm.workflow.instance.WorkflowRuntimeException: [com.biomorf.sampledemo:1 - CheckEvenOdd:3] -- argument type mismatch           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:130)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:205)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:164)           at org.jbpm.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:55)           at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:51)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:124)           at org.jbpm.workflow.instance.node.DynamicNodeInstance.signalEvent(DynamicNodeInstance.java:69)           at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:346)           at org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction.execute(DefaultSignalManager.java:118)           at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:977)           ... 5 more Caused by: java.lang.IllegalArgumentException: argument type mismatch           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.jbpm.bpmn2.handler.ServiceTaskHandler.executeWorkItem(ServiceTaskHandler.java:49)           at org.drools.process.instance.impl.DefaultWorkItemManager.internalExecuteWorkItem(DefaultWorkItemManager.java:70)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:124)           ... 14 more please help me.... thank you in advance, warm regards, prashanth r dundigal -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/755045#755045] Start a new discussion in jBPM Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]