I'm using omniORB 4.x and I run into this bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4811989 In jdk 1.4... Strangely (or not) version 3.x of omni works. It is an JDK bug and it is valid to say - go and use JDK 1.6 but if anyone knows work around ???? Thanks a lot.