<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><div data-html-editor-font-wrapper="true" style="font-family: arial, sans-serif; font-size: 13px;">Dear TeX live-rs,<br><br>I discover some strange behavior. If I compile the minimal file "hb-bof.tex" with pdflatex belonging to TeX Live 2023, I got the message<br> <p>(\end occurred when \ifx on line 2 was incomplete)</p>at the process's end. If I compile with pdflatex from TeX Live 2021, this message disappears. This seems to be related to the "ltugproc" class, because if I replace it by "article", this message also disappear. But I performed a "diff" of the 2 versions of this class: only the dates are different.<br><br>All the best,<br><br>Jean-Michel Hufflen<br><br><br><signature></signature></div></body></html>