If you get an error message when you run 'heph.bat' or 'heph.sh' saying
something like "class java/lang/Thread not found", or "-jar: unknown
switch", or "java: command not found", you don't have Java 1.3 or later
installed. See Installation step 1. In
particular, a lot of systems (including SuSE Linux, which is what I use)
still have Java 1.1 installed, which is about 4 years obsolete; 1.1 is okay
for old applets, but it's not advanced enough for Hephaestus.
You can type the following command at your shell (this works in Unix,
Windows, and MacOS X) to see which version of Java you have installed:
% java -version