Thanks for both replies, the question was solved ...till today. Did a tlmgr update -all of texlive2019, rebuilt the database of fonts as described in the texlive documentation, the processes not throwing errors, but since, and only luatex, throws the following error on the terminal, and produces no output pdf.
Terminal stdout of luatex run on file, both versions the commented and the non-commented content was used:
%\input luafonts %\input opmac %\font\tenrm="DejaVu Serif" %\tenrm Hello %\bye %%% and the second part, of course commented while uncommenting the first part %%% above this line. \input opmac.tex \input luaotfload.sty \font\tenrm="DejaVu Serif" \tenrm Hello \bye
FONT: AMS math fonts - \mathchardef's prepared, 12 math families preloaded.) OPmac: etex.src macros detected (/home/m___/.texmf/tex/mtex/opmac-luatex.tex)) (/home/m___/.texmf/tex/mtex/luaotfload.sty (/home/m___/.texmf/tex/mtex/ltluatex.tex) luaotfload | load : FATAL ERROR luaotfload | load : × Failed to load module "luaotfload-database.lua". luaotfload | load : × Error message: luaotfload | load : × "[string \"-- luatex-core security and io overloads .......\"]:45: bad argument #1 to 'io_open' (string expect ed, got nil)". stack traceback: ...019/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:181: in upvalue 'loadmodule' ...019/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:257: in local 'initialize' ...019/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:307: in field 'main' [\directlua]:1: in main chunk + 1! ~/proj:
Both runs have the same output to terminal, I realize that not having looked into luatex and it's code, that some luaprimitives must be at play here? Could you suggest where to start in solving the issue again. Tnks.