"kukeltje" wrote : It does not change the bahaviour. The behaviour you see is as designed. This is how you assign a task to an individual user from a pool of 'possible users'. If you set the actor to null again, it is 'assigned back' to the pool Tks Ronald, but I already understood this part. The problem is with swimlaneInstance, which affects not only one peticular task but also all the tasks related to this swimlane. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4040594#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...