Fixed: Solution: <s:link> wasn't properly rendering the cid and clr parameters. That is, it couldn't detect there was a long-running conversation at the time of rendering. It was until later during the page where I initialized another component where it then started the initial conversation, and other subsequent <s:link> could properly find the cid and clr parameters. Hence, the exception occur as there were no parent conversation to begin a nested conversation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3997086#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...