"tom.baeyens(a)jboss.com" wrote : you can update process definitions. (you have to evict the process definitions in hibernate's second level cache, though) | | it is not encouraged, just as modifying java byte code in a running program is not encouraged. you can get into trouble real easy. | | same goes for migrating process instances to a newer version. we plan to provide some support for it in the future, but it is easy to end up trouble. | | regards, tom. could someone please explain this a little more or give me a link to this . I'm using jbpm 2. is this posibble here ? Also is there a tutorial for migrating from jbpm 2 to jbpm 3. I see the archive migration, but what happens to my existing process instances in DB ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4044997#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...