"norman.richards(a)jboss.com" wrote : That database manager has no relationship to Seam whatsoever. If you are using DefaultDS, the hsql JARs and the MBean that controls the datasource are completely outside of your EAR. Even if you are using a private hypersonic instance like the dvd store does, it is also external to your EAR. | | I don't know what could cause a HeadlessException where one didn't exist previously, but I don't see how anything Seam is doing could be the cause. Thats definitive. I will have a chat with the icefaces croud. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030092#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...