Follow-up Comment #3, bug #552 (project tex4ht): The next one (test10-1.tex, also attached) was fine with platex, but make4ht resulted an error.
[ERROR] htlatex: Compilation errors in the htlatex run [ERROR] htlatex: Filename Line Message [ERROR] htlatex: /usr/share/texlive/texmf-dist/tex/generic/tex4ht/mathml.4ht 1390 Undefined control sequence. %%% \documentclass[12pt,a4paper]{article} \usepackage[comma,colon]{natbib} \usepackage{hyperref} \usepackage{breakurl} \begin{document} \begin{thebibliography}{} \bibitem[{Gulf News}(2021)]{gul21OHB} {Gulf News} (2021) {Video: A rare migratory bird rescued by Dubai resident (2021 May 20).} Downloaded from \url{https://gulfnews.com/uae/environment/video&a=1&rare=2&mig ratory=3&bird=4&rescued=5&by=6&dubai=7&resident=1.79307000}. \end{thebibliography} \end{document} (file #504) _______________________________________________________ Additional Item Attachment: File name: test10-1.tex Size:0 KB _______________________________________________________ Reply to this item at: <http://puszcza.gnu.org.ua/bugs/?552> _______________________________________________ Message sent via/by Puszcza http://puszcza.gnu.org.ua/