I'm sure this is some minor system config issue, but I'm puzzled. I unzipped JBoss AS 4.2.1 and run it and it fails with this exception: 17:17:14,000 WARN [BasicMBeanRegistry] javax.management.MBeanRegistrationException: preRegister() failed: [ObjectName='jboss.remoting:service=NetworkRegistry', Class=org.jboss.remoting.network.NetworkRegistry (org.jboss.remoting.network.NetworkRegistry@126f827)] | 17:17:14,021 ERROR [MainDeployer] Could not create deployment: file:/tmp/jboss-4.2.1.GA/server/default/conf/jboss-service.xml | org.jboss.deployment.DeploymentException: - nested throwable: (java.lang.reflect.InvocationTargetException) | at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:196) | at org.jboss.system.ServiceController.install(ServiceController.java:226) | This is on Linux, with Java 6. Huh? Any ideas on this? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4066509#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...