@Olivier: That is not true for states, tasks, etc... only for nodes that have no implementation (custom nodes) AFAIK. @unome: Yes, there is more to it. States etc have implementations do not expect to be signalled on events. De behaviour you get when signalling nodes in an event is undefined and in manyt cases leads to problems. If you need something like async signalling, use the jBPM specific 'queueing' or JMS implementation, but WITH the jBPM async functionality. I'll look at your code tonigh (CET) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962117#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...