Hi swatis Thanks for your reply! Well is "action" supported in 4.0.0? http://docs.jboss.com/jbpm/v4.0/userguide/html_single/#jpdl Can't find it there. I don't want to pass static parameters like 21 or xyz, I want to pass a variable passed on start up. Like: Start flow with a Person object, call "validate" java call and pass this person as parameter.... modchen describes exactly what I want to do. Do you have any clue how to do this? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4230988#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...