[jboss-user] [JBoss jBPM] - Signal Error

[MattOwens]

Could anyone please explain why this code throws the following exception:  "closed JbpmContext in different order then they were created... check your try-finally's around JbpmContexts blocks".

Code:

public JbpmProcessInstance(JbpmProcessDefinition processDef, bpmProcessInstanceVar var) 
{				
  beginSessionTransaction();
        try
        {			
		ProcessDefinition processDefinition =  jbpmContext.getGraphSession().loadProcessDefinition(processDef.getId());

		// create a new process instance to run
		processInstance = new ProcessInstance (processDefinition);

		if(var!=null)
			addProcessInstanceVar(var);		

		processInstance.signal();
	}
	catch (Exception e)
	{
		log.error(e.getMessage());
		throw new JBPMException(e.getMessage(),e);
	}
	finally
	{
		commitAndCloseSession();
	}		
}

The error is thrown on the signal() line. I have tried to find a reason for this for a number of days and as a result of not being able to am now loooking at other workflow solutions. could someeone please point me in the direction of an explaination so i can continue using JBPM?

Thanks

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