Putting ejb3-persistence.jar before weblogic.jar on JVM classpath solved this problem. I've got a new one though Unable to resolve 'examples-dataSource-demoPool' anonymous wrote : | <Mar 29, 2007 11:42:42 PM EDT> <BEA-149231> <Unable to set the activation state to true for the application 'jboss-seam-jp | a'. | weblogic.application.ModuleException: | at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:876) | at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:326) | at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:114) | at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) | at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26) | at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) | at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:25) | at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:640) | at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26) | at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:252) | at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154) | at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80) | at weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:176) | at weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:347) | at weblogic.management.deploy.internal.DeploymentAdapter$1.activate(DeploymentAdapter.java:50) | at weblogic.management.deploy.internal.AppTransition$2.transitionApp(AppTransition.java:30) | at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:232) | at weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:168) | at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:122) | at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173) | at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89) | at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64) | at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518) | at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207) | at weblogic.work.ExecuteThread.run(ExecuteThread.java:179) | javax.naming.NameNotFoundException: Unable to resolve 'examples-dataSource-demoPool'. Resolved ''; remaining name 'examples-dataSource-demoPo | ol' | at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:1123) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033000#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...