PeterJ - I followed your suggestion and solved that problem but fell upon another runtime error. It seems that there is an interdependency with the org.jboss.util.collection.WeakTypeCache class that seems to be missing from the jboss-common.jar. Here is the error message: java.lang.RuntimeException: Unable to create a KernelInitializer based on the specified KernelConfig at org.jboss.kernel.KernelFactory.createKernelInitializer(KernelFactory.java:156) at org.jboss.kernel.KernelFactory.assembleNewKernel(KernelFactory.java:99) at org.jboss.kernel.KernelFactory.newInstance(KernelFactory.java:67) at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.bootstrap(AbstractBootstrap.java:114) at com.nichpro.jmx.bootstrap.EmbeddedBootstrap.bootstrap(EmbeddedBootstrap.java:52) at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.run(AbstractBootstrap.java:83) at com.nichpro.jmx.server.DataManagementServer.main(DataManagementServer.java:229) Caused by: java.lang.NoClassDefFoundError: org/jboss/util/collection/WeakTypeCache at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$000(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactory.(IntrospectionTypeInfoFactory.java:40) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at org.jboss.config.plugins.property.PropertyConfiguration.loadFromProperties(PropertyConfiguration.java:137) at org.jboss.config.plugins.property.PropertyConfiguration.createDefaultTypeInfoFactory(PropertyConfiguration.java:92) at org.jboss.config.plugins.AbstractConfiguration.getTypeInfoFactory(AbstractConfiguration.java:130) at org.jboss.classadapter.plugins.BasicClassAdapterFactory.getClassAdapter(BasicClassAdapterFactory.java:60) at org.jboss.config.plugins.AbstractConfiguration.getBeanInfo(AbstractConfiguration.java:68) at org.jboss.kernel.plugins.config.AbstractKernelConfig.getBeanInfo(AbstractKernelConfig.java:65) at org.jboss.kernel.plugins.config.property.PropertyKernelConfig.getImplementation(PropertyKernelConfig.java:175) at org.jboss.kernel.plugins.config.property.PropertyKernelConfig.createKernelInitializer(PropertyKernelConfig.java:120) at org.jboss.kernel.KernelFactory.createKernelInitializer(KernelFactory.java:150) ... 6 more Is this class found in another jar or do I need to download and build from some where else? Regards, GMarsh View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4194462#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...