I upgraded (i.e. installed) JBDS 2.0CR2 and reproduced the error: severity: error | | msg: org.hibernate.console.HibernateConsoleRuntimeException: Persistence unit not found: 'null'. | | exception stack trace: org.hibernate.console.HibernateConsoleRuntimeException: Persistence unit not found: 'null'. | at org.hibernate.console.ConsoleConfiguration.buildJPAConfiguration(ConsoleConfiguration.java:148) | at org.hibernate.console.ConsoleConfiguration.buildConfiguration(ConsoleConfiguration.java:541) | at org.hibernate.console.ConsoleConfiguration.access$0(ConsoleConfiguration.java:526) | at org.hibernate.console.ConsoleConfiguration$2.execute(ConsoleConfiguration.java:222) | at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:64) | at org.hibernate.console.ConsoleConfiguration.buildWith(ConsoleConfiguration.java:204) | at org.hibernate.console.ConsoleConfiguration.build(ConsoleConfiguration.java:111) | at org.hibernate.eclipse.console.workbench.ConsoleConfigurationWorkbenchAdapter.getChildren(ConsoleConfigurationWorkbenchAdapter.java:40) | at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.getChildren(BasicWorkbenchAdapter.java:99) | at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:105) | at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:234) | at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) | | session data: eclipse.buildId=M20090107-0800 | java.version=1.5.0_17 | java.vendor=Sun Microsystems Inc. | BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US | Command-line arguments: -os win32 -ws win32 -arch x86 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4216691#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...