print<<HTML;
the
following lines
HTML;

means print "the following lines", as formatted, to stdout, until we find a line that has HTML; alone on it. If you want to check out the code (perl stuff) you'd probably be better off with an editor that has a better understanding of perl than HTML.

Check that perl finds all modules that are used. If the -w flag is not given, add it while debugging.

Edit: Late as usual Good suggestions!

/Michael