Which version of JBoss are you using? Which JVM? What operating system? It might also help to provide the lines that appeared on the console right before this error. Also, how did you install? Via the zip file or the JEMS installer? If via zip file, which configuration are you running? If via JEMS installer, what options did you select? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033309#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...