More extensive diagnostics, from the Perl debugger,
can be obtained by appending the string `-w-'
to the 1st line of the latex2html (and other) Perl script(s).
96.1f
\htmltracing{...}
command,
whose argument is the desired value,
or by using the more general \HTMLset command
as follows: \HTMLset{VERBOSITY}{
<num>}.