feature, and not xetex specific $ ls MM* MM3.dat MM3.dat.tex
$ kpsewhich MM3.dat ./MM3.dat.tex $ kpsewhich --all MM3.dat ./MM3.dat.tex ./MM3.dat If both are available kpsearch prefers the .tex as shown by the first call to kpsewhich David On Tue, 20 Sept 2022 at 16:40, Philip Taylor (Hellenic Institute) < p.tay...@hellenic-institute.uk> wrote: > Given > > \newread \standin > \openin \standin = MM3.dat > > I had expected XeTeX to open MM3.dat for input — instead, it opened > MM3.dat.tex > > Bug or feature ? > > -- > *Philip Taylor* >