transient variable

Hi.

I'm running Bonita Studio 6.3.2 Performance

I've put some transient vars in my start pageflow (ie. not of a human task).

I update them using a Groovy script called when a field gets updated (ie. contingency)

I need to send escalation for every task based on the timer condition. What I was looking at is to have a common Service task which sends email and use the same task to connect to a timer. Now just to know for which process I am sending escalation email, I tried defining a transient variable 'processName' at pool level with default value. And then I tried accessing its value directly by name for e.g. processName in the Service task connector. But this is not working and the engine says that variable is not defined.