Hello, another attempt with ConTeXt and I'm getting this: $ context t.tex mtx-context | run 1: luatex --fmt="/home/gour/.texlive/texmf-var/luatex-cache/context/0399a8df3aef8d154781d0a9c2b8e28d/formats/luatex/cont-en" --jobname="t" --lua="/home/gour/.texlive/texmf-var/luatex-cache/context/0399a8df3aef8d154781d0a9c2b8e28d/formats/luatex/cont-en.lui" --no-parse-first-line --c:currentrun=1 --c:fulljobname="./t.tex" --c:input="./t.tex" --c:kindofrun=1 --c:maxnofruns=9 "cont-yes.mkiv" This is LuaTeX, Version 1.07.0 (TeX Live 2018/Arch Linux) system commands enabled. open source > level 1, order 1, name '/usr/share/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2018.04.04 00:51 MKIV beta fmt: 2019.2.14 int: english/english system > system > 'cont-new.mkiv' loaded open source > level 2, order 2, name '/usr/share/texmf-dist/tex/context/base/mkiv/cont-new.mkiv' close source > level 2, order 2, name '/usr/share/texmf-dist/tex/context/base/mkiv/cont-new.mkiv' system > files > jobname 't', input './t', result 't' fonts > latin modern fonts are not preloaded languages > language 'en' is active open source > level 2, order 3, name '/home/gour/tmp/t.tex' fonts > preloading latin modern fonts (second stage) fonts > 'fallback modern-designsize rm 12pt' is loaded structure > sectioning > section @ level 3 : 0.0.1 -> Testing ConTeXt tex error > tex error on line 4 in file /home/gour/tmp/t.tex: ! Missing number, treated as zero <to be read again> \23>>currentnamedsection \popmacro ...m_syst_helpers_push_macro \endcsname \global \advance \lastname... l.4 \stopsection 1 \starttext 2 \section[title={Testing ConTeXt}] 3 This is my document using Croatian chars: šŠ đĐ čČ ćĆ žŽ. 4 >> \stopsection 5 \stoptext 6 7 8 9 ? The file is: $ cat t.tex \starttext \section[title={Testing ConTeXt}] This is my document using Croatian chars: šŠ đĐ čČ ćĆ žŽ. \stopsection \stoptext I'm using Manjaro Linux (stable branch): $ context --version mtx-context | ConTeXt Process Management 1.02 mtx-context | mtx-context | main context file: /usr/share/texmf-dist/tex/context/base/mkiv/context.mkiv mtx-context | current version: 2018.04.04 00:51 Any clue what's wrong? Sincerely, Gour -- A self-realized man has no purpose to fulfill in the discharge of his prescribed duties, nor has he any reason not to perform such work. Nor has he any need to depend on any other living being.