Hi Juan. I think it is a good idea NOT to model all the backward transitions. Unfortunetely there is no out-of-the-box way of undoing (means rolling back a business transaction) at the moment. And some things have to be considered, like compensating actions and the like. There was a discussion about it already a couople of times, but if I am right, it is not yet built in. We always implemented it project specific if required. Cheers Bernd View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4265798#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...