I am using JBoss Portal 2.4.1-SP1. If I hot deploy HelloWorldIPCPortlet.SAR it works correctly without any errors. However, when I stop and then start JBoss Portal I the following error appears in the log file. If I stop JBoss Portal, remove HelloWorldIPCPortlet.SAR, and then start JBoss Portal again the error disappears. Any help would be greatly appreciated. Richard --- MBeans waiting for other MBeans --- ObjectName: portal:container=Instance State: FAILED Reason: org.jboss.deployment.DeploymentException: No Attribute found with name: CacheNaturalId I Depend On: portal:service=Hibernate,type=Instance portal:service=PortletInvoker,type=Instance portal:service=PortalAuthorizationManagerFactory portal:service=AuthorizationDomainRegistry Depends On Me: portal:controller=Request portal:deployer=PortalWebApp portal:deploymentFactory=PortletApp ObjectName: portal:container=PortalObject State: FAILED Reason: org.jboss.deployment.DeploymentException: No Attribute found with name: CacheNaturalId I Depend On: portal:service=Hibernate,type=PortalObject portal:service=PortalAuthorizationManagerFactory portal:service=AuthorizationDomainRegistry portal:service=ListenerRegistry Depends On Me: portal:commandFactory=DefaultPortal portal:commandFactory=PortalObject portal:controller=Request portal:deployer=PortalWebApp portal:deploymentFactory=Object ObjectName: portal:commandFactory=DefaultPortal State: CONFIGURED I Depend On: portal:commandFactory=Delegating portal:container=PortalObject Depends On Me: portal:controller=Request ObjectName: portal:commandFactory=PortalObject State: CONFIGURED I Depend On: portal:container=PortalObject Depends On Me: portal:commandFactory=Delegate,prefix=portal ObjectName: portal:commandFactory=Delegate,prefix=portal State: CONFIGURED I Depend On: portal:commandFactory=Delegating portal:commandFactory=PortalObject ObjectName: portal:controller=Request State: CONFIGURED I Depend On: portal:service=PageService portal:commandFactory=DefaultPortal portal:urlFactory=Delegating portal:service=InterceptorStack,type=Command portal:container=PortalObject portal:container=Instance ObjectName: portal:deployer=PortalWebApp State: CONFIGURED I Depend On: jboss.system:service=MainDeployer portal:container=PortalObject portal:container=Instance portal:service=Server Depends On Me: portal:deploymentFactory=Object portal:deploymentFactory=PortletApp portal:deploymentFactory=Layout portal:deploymentFactory=LayoutFeatures portal:deploymentFactory=Theme portal:deployer=Adapter ObjectName: portal:deploymentFactory=Object State: CONFIGURED I Depend On: portal:deployer=PortalWebApp portal:container=PortalObject ObjectName: portal:deploymentFactory=PortletApp State: CONFIGURED I Depend On: portal:id=local,service=PortletInvokerRegistration portal:deployer=PortalWebApp portal:service=WebAppRegistry portal:service=ServerConfig portal:service=PortletSecurityService portal:container=Instance ObjectName: portal:deploymentFactory=Layout State: CONFIGURED I Depend On: portal:deployer=PortalWebApp portal:service=LayoutService ObjectName: portal:deploymentFactory=LayoutFeatures State: CONFIGURED I Depend On: portal:deployer=PortalWebApp portal:service=LayoutService ObjectName: portal:deploymentFactory=Theme State: CONFIGURED I Depend On: portal:deployer=PortalWebApp portal:service=ThemeService ObjectName: portal:deployer=Adapter State: CONFIGURED I Depend On: jboss.web:service=WebServer portal:deployer=PortalWebApp --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: portal:container=Instance State: FAILED Reason: org.jboss.deployment.DeploymentException: No Attribute found with name: CacheNaturalId I Depend On: portal:service=Hibernate,type=Instance portal:service=PortletInvoker,type=Instance portal:service=PortalAuthorizationManagerFactory portal:service=AuthorizationDomainRegistry Depends On Me: portal:controller=Request portal:deployer=PortalWebApp portal:deploymentFactory=PortletApp ObjectName: portal:container=PortalObject State: FAILED Reason: org.jboss.deployment.DeploymentException: No Attribute found with name: CacheNaturalId I Depend On: portal:service=Hibernate,type=PortalObject portal:service=PortalAuthorizationManagerFactory portal:service=AuthorizationDomainRegistry portal:service=ListenerRegistry Depends On Me: portal:commandFactory=DefaultPortal portal:commandFactory=PortalObject portal:controller=Request portal:deployer=PortalWebApp portal:deploymentFactory=Object View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024601#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...