Cannot run RapidMiner process from Python with Performance Operator

I am trying to run a RapidMiner process using a Python script. When I run the process ( Decision Tree Model) without Performance operator, I am able to successfully execute it via connector.run_process but when I add Performance operator, the Python script fails with the error: 

 raise ValueError("Cannot handle files with '" + str(extension) + "' extension.")

ValueError: Cannot handle files with '.ioo' extension. 

I am attaching my process rmp files without Performance operator and with performance operator.
I am executing following code in python:

<p>connector = rapidminer.Studio(rm_home, rm_stdout=None, override_python_binary=True)</p><p><span style="background-color: transparent; color: inherit; font-size: inherit; font-family: "open sans", sans-serif;">my_process = connector.run_process("//Local Repository/processes/MyProcess")</span><br></p>