I'm trying to use JBPM in combination with JBOSS Messaging under JBOSS 4.0.5. Depending on whether I have jbpm deployed scoped or not I get different errors during/after deployment of the MDBs jar package: With jbpm unscoped directly during startup: [org.jboss.jms.client.container.ExceptionInterceptor] Caught RuntimeException java.lang.ClassCastException: org.jboss.jms.destination.JBossQueue With jbpm scoped: The server starts fine but I get an error within the MDB, which attempts to access JBPM: java.lang.ClassCastException: org.jbpm.JbpmConfiguration I guess I'd have to use the same classloader for the MDB jar as for jbpm.sar. (I use the jar just for testing purposes now, likely becomes an ear in future) I wonder if there is somebody who has already figured out the right setup (e.g. I also don't have jbpm.3.1.2.jar not in the sar but in deploy/xxx/lib) for this combination. Any comments/hints are highly appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3984614#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...