Nicolas, i faced the same problem about using jBPM in a project useing toplink as a presistance mapping , but i do it and it is working, realy i faced some problems about lib conflects but it solved. also take care about the application server u will delpoy on, if using OAS you will face a lot of problems. I'm still trying deploy under OAS 10g but didnt finished yet, whover deployed successfully under Tomcat6. Mohamed View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4243042#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...