I think we can take core versions into account in several ways. One thing that would be required then is to be able to retrieve a version of the core. Then some functionality will just be hidden if it ios not doable with the deployed core, or shown as 'upgrade to a later core if you want this functionality'. Methods e.g. not implemented in the JbpmContext in certain versions of the core could be in a convenience class, backported if doable or partly backported and throwing an 'not implemented' exception. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963588#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...