I know, but most people know how to use google... some small searches with basic terms from the 'errors' yields lots of results... lots.... The thing is that these errors have *nothing* to do with jBPM. The first one is just a plain jdk-logging/log4j logging thing, the second one is because classes are compiled with a newer jdk then the one they run on without code compatibility.... see... *nothing* to do with jBPM View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4164342#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...