After considerable experimentation I have found scripts which will run ppower4 on both my Linux system at home and the Sparc Solaris system at work. The supplied script does not work, giving the above error. I have no idea why these scripts work or the supplied one does not. It would be helpful, to me and undoubtedly to others who have tried it, if someone who is acquainted with Java would give a more comprehensive discussion. Here is the script for RedHat 6.2 Linux: ---------------------------------------------------------------- #!/bin/sh basedir=/home/mitchell/download/pp4 java -jar ${basedir}/pp4.jar "$@" ---------------------------------------------------------------- Here is the script for Solaris: ---------------------------------------------------------------- #!/usr/local/bin/bash basedir=/home/fac0/mitchell/tmp/pp4 jre -cp $basedir/pp4.jar de.tu_darmstadt.sp.pp4.PPower4 "$@" ---------------------------------------------------------------- The versions are: ------ on Linux Kaffe Virtual Machine Copyright (c) 1996-2000 Transvirtual Technologies, Inc. All rights reserved ----- on Solaris machine hardware: sun4u OS version: 5.6 Processor type: sparc Hardware: SUNW,Ultra-5_10 Java(tm) Runtime Loader Version 1.1.3 - Bill Mitchell