Version 0.5.0 ------------- This is the first release, so, expect to run into some problems. JanosVM v0.9.0 has not been released yet, so you either need to use JDK1.4 or the Emulab (http://www.emulab.net) images. The tutorial only covers starting up the Health agent and not the development of a simple protocol. There is a skeleton protocol in the "apps/hello" directory, but no accompanying instructions. If you are using JDK1.4 you may encounter a NoClassDefFoundError for sun.reflect.ConstructorAccessorImpl or sun.reflect.MethodAccessorImpl. This error appears to be a bug in the JVM since it just spontaneously occurs even after a previous call to the method succeeded. For Mac OS X, with Java 1.4.1 Developer Preview 6: You need to set the "java.net.preferIPv4Stack" property, otherwise multicast will not work properly.