I managed to get rid of the problem. There was a classpath / buildpath problem and a wrong spelled package name when referencing a class in the process definition. I'm glad about the change to a more meaningful error message because I basically had 2 different problems but this wasn't clear to me so I searched at wrong place. Deployment using the unit tests now works. On Monday I will have to see if it also works with ant deployment task. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263296#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...