Hi, I have looked through the latest process to exhibit this problem, and examined the tasks in the eclipse properties panel. The 'Signalling' checkbox is ticked, and the 'Blocking' checkbox is not ticked. So Salaboy21's post may shed some light on this for me. Can anyone confirm it is possible for tasks to get out of sequence without blocking checked ? Or is it possible to reproduce this behaviour with non blocking tasks ? Thanks for your help, Ross View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4186324#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...