Hi In the same ejb jar file i have put some helper classes under package a.b.c.ClassA, a.b.c.ClassB Session bean is a.c.d.SessionBean. This session bean is invoking ClassA and classA in turn uses class B. They are all packaged in single ejb jar file and deployed. When I invoke SessionBean it is able to access ClassA but when ClassA invokes ClassB i get ERROR - java.lang.NoClassDefFoundError a/b/c/ClassA ---------------------- --------------------- at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method). Is it correct to package as i have done above or I am doing something wrong? Regards, aShutosh View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3997737#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...