If some more context is helpful: To duplicate: shell$> cd [jboss working copy]/ejb3 | shell$> ./build.sh -f build-test.xml -Dtest=ejbthree1123 ejbthree1123 test Another example error: java.lang.NoClassDefFoundError: org/jboss/resource/adapter/jms/inflow/dlq/AbstractDLQHandler Cause: java.util.ConcurrentModificationException | at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1031) | at java.util.TreeMap$KeyIterator.next(TreeMap.java:1058) | at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:235) | at org.jboss.mx.loading.UnifiedClassLoader.loadClassImpl(UnifiedClassLoader.java:290) | at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:441) | at java.lang.ClassLoader.loadClass(ClassLoader.java:251) | at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) | at java.lang.Class.getDeclaredConstructors0(Native Method) | at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357) | at java.lang.Class.getConstructor0(Class.java:2671) | at java.lang.Class.newInstance0(Class.java:321) | at java.lang.Class.newInstance(Class.java:303) | at org.jboss.resource.adapter.jms.inflow.JmsActivation.setupDLQ(JmsActivation.java:400) | at org.jboss.resource.adapter.jms.inflow.JmsActivation.setup(JmsActivation.java:339) | at org.jboss.resource.adapter.jms.inflow.JmsActivation$SetupActivation.run(JmsActivation.java:692) | at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204) | at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:260) | at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) | at java.lang.Thread.run(Thread.java:595) S, ALR View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109499#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...