Let's make it clear: 1) Signalling is when the task (s) are done the (last one, the first one, etc. Look for signal attribute in task-node) task that is ended signal the token to continue the execution. If you don't check this option (or put the attribute) when you end some task you need to manually signal the token to continue the execution. It's like a silence ended task if you don't put the task signalling 2) Blocking means that the task could not be signaled until the tasks inside the task-node are (all, the first, etc. Look for the signal attribute in task-node) ended. So if you not set this attribute. Your user can manually signal the node and the process will continue though the taks are not ended yet. I think that is clear enough.. Hope it helps. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4187674#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...