On Tue, 5 Dec 2023, Herbert Voss wrote:
That is the user preamble! It _must_ be inserted by you.
Herbert, Well, it's not in Documents -> Settings -> Preamble and I had no reason add it and was unaware that it was in the .tex file.
It was a wrong font encoding° LyX inserts \usepackage[T1]{fontenc} \usepackage[latin9]{luainputenc} which is completly nonsense if using lualatex. You'll get unknown commands and no bibliography.
I don't use lualatex; only pdflatex. Somehow lyx inserted those two packages because I had no reason to do so. Regards, Rich -- lyx-users mailing list lyx-users@lists.lyx.org http://lists.lyx.org/mailman/listinfo/lyx-users