Hi , I am using Insignia Jeode JVM to run my java application. Jeode Jvm is compatible with jdk1.1. In my application I am using java.net.Authenticator class, which is availaible only in jdk1.2. I have compiled in my Linux machine using javac -target BasicReader.java and this works fine in the linux machine which has jdk1.4 in it. But when i transfer the .class file to Jeode and when i try to run the evm BasicReader i am getting the following error. Exception in thread "main", java.lang.NoClassDefFoundError: java/net/Authenticator at BasicReader.main(bytecode 0) could you please explain me why this happens and how to rectify it.