Thank you once again for your reply :) Huisheng Xu,
I think what you want to do is sending message between different branches of process instance. If ADMIN have not assign the task to a employee, the starter of process instance could have a chance to end the process instance. But if ADMIN is already assign the task to a emloyee, the starter of process instance could not cancel the process instance any more. Do you mean that?
Yes i mean what you said above..
Then how should i can proceed further ??