Alex, In ProcessInstance.end(), consider session-locking the parent process token while the signal() is performed on it. Sorry, I don't know where to get the Session object from, what locking mode to use, etc. - I'm not skilled with Hibernate yet. Look at Join.execute() as a model. I appreciate where you're coming from with some of your other comments... -Ed Staub View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049747#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...