Hi list, I am new to LMTX, so before going any further I wanted to compile my plain TeX documents with LMTX. I am aware that LMTX is experimental, so perhaps what I am doing is impossible for the moment or worse, it is not even in your plans. In any case, this is how I got a segmentation fault when I was trying to make the plain format for LMTX in my Debian 10 Buster OS on linux-64 PC. <pre> $ cd ~/context/ $ ./install.sh $ ~/context/tex/texmf-linux-64/bin/luametatex --ini lmtx.tex This is LuaMetaTeX, Version 2.03.7 (INITEX) Segmentation fault $ cd ~/context/tex/texmf-cache $ rm -R * $ cd ~/context/ $ ~/context/tex/texmf-linux-64/bin/mtxrun --generate $ ~/context/tex/texmf-linux-64/bin/context --make $ ~/context/tex/texmf-linux-64/bin/luametatex --ini lmtx.tex This is LuaMetaTeX, Version 2.03.7 (INITEX) Segmentation fault $ ~/context/tex/texmf-linux-64/bin/luametatex --ini plain.tex This is LuaMetaTeX, Version 2.03.7 (INITEX) Segmentation fault $ cat $(~/context/tex/texmf-linux-64/bin/mtxrun --locate lmtx.tex) \input plain \directlua {tex.enableprimitives('', tex.extraprimitives())} \pdfoutput=1 \everyjob \expandafter {% \the\everyjob \input luatex-basics.tex\relax \input luatex-fonts.tex\relax \input luatex-mplib.tex\relax } \edef\fmtversion{\fmtversion+lmtx} </pre> Best regards, Ramón Casares