Brad, JBoss has a (maven?) repository. Yes, their own, but it's just to have a little more control. See repository.jboss.com jbpm is in there, only not with a pom which holds all dependencies. There is a difference in the libs required for building and running (at least lots of differences per application server). I'll pass it on to see how others react. The list of required libs is in the docs. Did you miss some there? If so, let us know or better yet, file a Jira issue. Regarding the classloading (you threadjacker, oh sorry, it is your thread :-)) it could be a jbpm thing or not. Could you in a little more detail describe the structure and names of jars/sars/wars, what they supposed to do and from what class in what file you were trying to call another class and which one. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3965573#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...