Hi Marco,
I'm using jBPM5.1.
In the work flow, I have a rule node to define the delay time for the timer. After timer expires, I'm doing a soap web service call. So there's nothing sepcial I'm doing with the knowledgesession while the timer is waiting.
I also did a test work flow in which a timer sits in between two simple script task nodes. When I started it in a simple java app, it worked well. However when i put it in my project, which runs in JBoss and triggers the work flow after a jms comes in, the work flow cannot be resumed after the timer expires.
Thanks and regards
Yu