Hi Francesco (and who reads here)! I searched and read and searched again, after reading your very useful links, and my problem remained the same: WebService in EJB 3.0 must be deployed over StateLESS Session Beans, then there is no way to mantain the state of the current process running - apart from explicitly pass it through the methods' parameters. For example, if I want the user to select a product @WebMethod public void selectProduct(Product p) before adding it to cart @WebMethod addToCart(Product p), this rule is easily expressible on a process. But how may I connect the transition of the process instance to the WS calls? Then, it seems that Seam works best (with conversation ids and so on), to my purpose - more than the jBPM / jPDL suite for JBossAS. Am I wrong? If so, tell me (any link with examples or whatever should be very appreciated! :) Thanks in advance! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4174539#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...