It's really simple. All the timer is supposed to do is wait for one minute. I just deploy a servlet so that I can use my browser to signal the process instance. You have the servlet's doGet method code above. Nothing else is needed, because it encapsulates the process definition in XML. What I can't understand is why I get this message : couldn't cancel timers 'Timer' for 'Token(/)' when I call processInstance.signal(). Why would jBPM be trying to cancel a timer that isn't even started ??! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4087285#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...