Thanks for your explanation. By current 'api', you mean the existing interfaces in jBPM 3 code base? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4188826#4188826 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4188826