OK, A little off topic, but this is stopping me upgrading the JVM that Tomcat uses. I have a serialzed class that was written out using the old 1.1.6 JVM. I now need to read it in using the 1.3 JVM. However if I try to do so I get: # # An EXCEPTION_STACK_OVERFLOW exception has been detected in native code outside the VM. # Program counter=0x77e848dd # # Is there a solution to this ? Is there a better place to ask. I've search javasoft but to no avail. I am a bit stuck at present ! Andy C Editor The R2 Project http://www.r2-dvd.org