how easy it is is completely dependend on what you want to change and what states the processinstances are in. E.g. deleting a tasknode where there are processintances that have tokens in those nodes requires repositioning those tokens. There are many issues similar issues that have to be taken into account. You have to figure out which will apply to you. But once these are done, changes will be reflected in the running intances. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131705#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...