Hi, I just come to add precisions on my previous solution (it can eventualy help). Finally there is a big problem with the previous solution : you can't control the result of the servlet and the task is always validated. It didn't matter for me so far... but now I need it. So I came back to the old solution and I'm now validating my task and everything in the servlet with the taskInstance ID I get in EL like that : #{taskInstanceBean.taskInstance.id} View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051338#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...