GPInvocationException:ERROR_ALREADY_STOPPED

Question

Hi Experts,
I am using SAP EP 7.0 SP05.
I have created a GP process and started it from my Web Dynpro program using GP API and could not do that. The process was having a parallel dynamic block and the actions roles at the sequential block level were not visible at parallel dynamic block or process level. I found this happens when I consolidate roles at sequential block level. I was getting "Process initiation failed: can not read the activity" exception. However, if I pass the Recipient Address parameter as simple UserID, I could execute it through both manually and using GP API. (Anyone knows why?)
The structure of the process is:
Process
|__Parallel Dynamic Block
        |__Sequential block
               |___Action_Send (Notification CO)
               |      (Parameters)
               |       |___Recipient Address (Tech. Name: address)
               |       |___surveyId (Tech Name: survryId)
               |       |___empId(Tech Name: empId)
               |___Action_Perform (Web Dynpro CO)
                       (Parameters)
                        |___ address(Tech. Name: address)
                        |___surveyId (Tech Name: survryId)
                        |___empId(Tech Name: empId)
So, I created another process template with same structure without role consolidation at seqential block level and was successfully running it manually even passing Recipient Address parameter as actual e****. Now, when I try to initiate this process using GP API, I am getting exception "GPInvocationException:ERROR_ALREADY_STOPPED."
This I found I am getting even at the very first line of my code when I try to get the GP User context:
(IGPUserContext userContext = GPContextFactory.getContextManager().createUserContext(user);)
Now I am trying to invoke the first process, which I could initiate earlier using GP API, though with wrong input values, and that also is ending with same error.
I do not what may possibly be the reason of this error and where should I dygnose to rectify this error.
Thanks in advance,
Aditya

Answer 1

I am using Notification email CO and all parameters are email_address/email rather than address but I could not post it that way because forum does not allow words like email. Please read parameters in that context only.
Thanks,
Aditya