[jbpm-dev] [jBPM Development] - Re: Java Activity not using Interface

[jbpmjboss11]

 When i try to get return value from the method of the class mentioned in the Java task ... i get following nullpointerException ... Have no clue how to get rid of this... I am very well able to call the method with input object and all, but for some reason i get NullPointerException on line... 

String out = (String)executionService.getVariable(pid, "answer1");

And this is the exception ...

java.lang.NullPointerException
	at org.jbpm.pvm.internal.cmd.GetExecutionVariablesCmd.execute(GetExecutionVariablesCmd.java:60)
	at org.jbpm.pvm.internal.cmd.GetExecutionVariablesCmd.execute(GetExecutionVariablesCmd.java:36)
	at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
	at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
	at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54)
	at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
	at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.getVariable(ExecutionServiceImpl.java:130)



my java task xml is ...

  |    <java class="com.abc.MyClass" g="173,70,175,58" method="test" var="answer" name="Retrieve Application" >
  |        <arg><object expr="#{input.apre.force}"/></arg>
  | 

Thanks


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