Hello all, I just hope it is a right thread for my question. I'm running on Windows XP with JBoss 4.2.2.GA installed on it (but actually the same problem is also on Linux installation of JBoss). I've got a small client trying to do get an InitialContext() and talk to the local JBoss server running on same machine. I've got such an exception as a result: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/la ng/exception/NestableException at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12 4) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$000(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at $Proxy0.(Unknown Source) at sun.reflect.GeneratedSerializationConstructorAccessor16.newInstance(U nknown Source) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.io.ObjectStreamClass.newInstance(ObjectStreamClass.java:924) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1 737) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.rmi.MarshalledObject.get(MarshalledObject.java:142) at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:7 2) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:710) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627) at javax.naming.InitialContext.lookup(InitialContext.java:392) at JbossMainApp.appclient.Main.getResourceManager(Main.java:134) at JbossMainApp.appclient.Main.main(Main.java:56) I am running the app from batch file, and the command line is like this: | set clib_dir=D:\dev_folder\client_lib | set jboss_client_path=D:\dev_folder\jboss-4.2.2.GA\client | java -classpath %clib_dir%\velo.jar;%jboss_client_path%\jbossall-client.jar;%jboss_client_path%\log4j.jar;%jboss_client_path%\jsf-api.jar;%jboss_client_path%\ejb3-persistence.jar;%clib_dir%\password1_4.jar;%clib_dir%\commons-cli-1.0.jar;%clib_dir%\groovy-all-1.1-BETA-1.jar;%clib_dir%\commons-configuration-1.3.jar;%jboss_client_path%\jnp-client.jar app.main app_parameter The remarkable fact is that I have the same application call in another evironment (production env., installed on Linux server), with the same command line and pretty same configuration of JBoss - there I have it working well. I'll appreciate every help/hint. TIA. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4267650#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...