Follow-up Comment #3, bug #451 (project tex4ht): I've found the issue. We patch the `\usetikzlibrary` in `usepackage.4ht` for a better externalization support. I changed the following lines to get it work:
-\renewcommand\usetikzlibrary[1]{% - \use:tikzlibrary{#1}% - \find:externalize#1external\@nil% +\pend:defI\usetikzlibrary{\find:externalize##1external\@nil}% _______________________________________________________ Reply to this item at: <http://puszcza.gnu.org.ua/bugs/?451> _______________________________________________ Message sent via/by Puszcza http://puszcza.gnu.org.ua/