def METHOD_NAME(self):
    self.workflow = BpmnWorkflow(self.spec, self.subprocesses)
    script_task = self.workflow.spec.task_specs['Activity_0haob58']
    script_task.script = """in_1, in_2, unused = 1, "hello world", True"""
    self.advance_to_subprocess()
    task = self.workflow.get_tasks(TaskState.READY)[0]
    transform_task = task.workflow.spec.task_specs['Activity_04d94ee']
    transform_task.script = """out_1, unused = in_1 * 2, False"""
    with self.assertRaises(WorkflowDataException) as exc:
        self.complete_subprocess()
    self.assertEqual(exc.exception.data_output.bpmn_id, 'out_2')