OK, thank you for your information. Somewhere, I found that my problem *might* exist because I have two hibernateSessions, one for my application itself and one for the jBPM engine. Therefore, I am currently searching for a way to use my Spring "hibernateSessionFactory" bean as session factory for jBPM, too. Is there any possibility to do this? Also see a thread in the Seam forum at http://www.seamframework.org/Community/SpringSessionFactoryForSeamjBPMint..., if you are interested in this topic. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133652#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...