In JBPM3 even if there is some change in the class what all you have to do is make relevant changes in the class and deploye the whole process. No need to change the package of the class or class name. But in JBPM 4 you have to change the class name of class package both of which will result in changes not related to the business process modification. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4245720#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...