I assume that you are using the JBoss Portal + JBossAS bundle. I base this on you statement that you never set up a database - the bundle comes with Hypersonic set up as the database. I downloaded the 2.6.2 bundle, deployed wiki.war, and started the portal. Works fine. I then repeated this with the 2.6.3 bundle. Works fine. The exception you posted is what appears in the browser window. This usually is not all that helpful. There should be a corresponding stack trace in the console window, could you post that? What operating system are you using? Which version of the JDK? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126343#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...