Hello, I've got the following issue with JBoss AS 5.0.0 Beta: After I run a test (in "one-test" mode, so no previous test caused an time out etc.), I see on the server console that the corresponding jar is undeploying and the home interfaces are unbinding. But when I run the test again, I get InstanceAlreadyExistsException: 11:43:12,406 INFO [Server] JBoss (MX MicroKernel) [5.0.0.Beta (build: CVSTag=HE AD date=200608071122)] Started in 1m:3s:563ms 11:43:53,046 INFO [EjbModule] Deploying Customer 11:43:53,234 INFO [EjbModule] Deploying Account 11:43:53,250 INFO [EjbModule] Deploying Teller 11:43:53,281 INFO [EjbModule] Deploying Bank 11:43:54,687 INFO [ProxyFactory] Bound EJB Home 'Customer' to jndi 'bank/Custom er' 11:43:54,703 INFO [ProxyFactory] Bound EJB Home 'Account' to jndi 'bank/Account ' 11:43:54,718 INFO [ProxyFactory] Bound EJB Home 'Teller' to jndi 'bank/Teller' 11:43:54,734 INFO [ProxyFactory] Bound EJB Home 'Bank' to jndi 'bank/Bank' 11:43:54,734 INFO [EJBDeployer] Deployed: file:/D:/jboss-svn4/jboss-head/testsu ite/output/lib/bank.jar 11:44:02,093 INFO [EJBDeployer] Undeploying: file:/D:/jboss-svn4/jboss-head/tes tsuite/output/lib/bank.jar 11:44:02,125 INFO [ProxyFactory] Unbind EJB Home 'Bank' from jndi 'bank/Bank' 11:44:02,125 INFO [EjbModule] Undeployed Bank 11:44:02,125 INFO [ProxyFactory] Unbind EJB Home 'Teller' from jndi 'bank/Telle r' 11:44:02,125 INFO [EjbModule] Undeployed Teller 11:44:02,125 INFO [ProxyFactory] Unbind EJB Home 'Account' from jndi 'bank/Acco unt' 11:44:02,140 INFO [EjbModule] Undeployed Account 11:44:02,140 INFO [ProxyFactory] Unbind EJB Home 'Customer' from jndi 'bank/Cus tomer' 11:44:02,140 INFO [EjbModule] Undeployed Customer ************* An now I run the test again: ************* 11:44:17,390 INFO [EjbModule] Deploying Customer 11:44:17,421 INFO [EjbModule] Deploying Account 11:44:17,421 INFO [EjbModule] Deploying Teller 11:44:17,437 INFO [EjbModule] Deploying Bank 11:44:17,453 INFO [EntityContainer] Registration is not done -> stop 11:44:17,453 ERROR [AbstractKernelController] Error installing to Create: name=j boss.j2ee:module=bank.jar,service=EjbModule,uid=29596937 state=Configured mode=M anual requiredState=Create javax.management.InstanceAlreadyExistsException: jboss.j2ee:jndiName=bank/Custom er,service=EJB already registered. at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistr y.java:765) at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMB eanRegistry.java:234) . . . 11:44:17,531 INFO [EJBDeployer] Deployed: file:/D:/jboss-svn4/jboss-head/testsu ite/output/lib/bank.jar 11:44:17,968 INFO [EJBDeployer] Undeploying: file:/D:/jboss-svn4/jboss-head/tes tsuite/output/lib/bank.jar ****************** I saw similar issues for previous versions of the AS (all resolved) but I think this is the first for the Beta 5.0 version.