Regarding initiate GP process using GP API using webdynpro

Hi All,

I am trying to start a GP process using Gp api. But i am getting an error.

I tried the same blog named as

"How To Instantiate And Navigate To A GP Process From Web Dynpro Java".

But i am getting this error

"com.sap.caf.eu.gp.exception.api.GPEngineException: Role role.overseer of role type 2 should not be empty".

Can anyone please help me out in resolving this error. What else has to be done. Can anyone say where am i wrong. I have passed the correct "ProcessId". and i am able to retrieve the correct login User.

Thanx and Regards,

Divya