Hi Jim, > Thank you for the information, Karl. I'm certainly expecting some debugging > but I was at a loss as to where to dig in. >
The tutorial is still incomplete, unfortunately. There is some information about debugging here: https://www.kodymirus.cz/tex4ht-doc/FAQandTroubleshooting.html#faq-and-troubleshooting As Karl and Nasser said, you can try this command $ make4ht -a debug -m draft book.tex It should stop on errors and print the full terminal output. I think that in your case, the issue is caused by some package. I can see a clash between BibLaTeX and Endnotes, which I can confirm happens, and I will try to fix that. But there must be also some other issue, as it shouldn't result in a fatal error. Could you make a MWE that produces this fatal error a post it here? Best regards, Michal