Hi JDK 1.1.6 Version 3 libc5 : libc.so.5.4.4 / libdl.so.1.7.14 Invocation : javac mysample.java (with the right classpath) Message : unable to initialize thread ..... Is there a special version for libc and libdl ?? (It seems that the v3 has been built with libc-5.4.46 and libdl.so.1.9.9) Thank you for your help. Frank.