The problem is the following: $ java HelloWorld.class Can't find class HelloWorld.class As far as I understand the java_wrapper script even "./" should be in the CLASSPATH. But why doesn't this work then? When I make the .class executable and add the "binfmt_java" module to the kernel I can execute it. And I think "java ...class" worked before I first used the "binfmt_java" module, but I'm not sure about that. Any clues what's wrong here? TIA, Thomas