Thank for the reply, I tried various versions and the problem was the same. I actually found the sollution: Because of weblogic we had to use the <property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property> After removing this line jbpm work prefectly. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247559#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...