Hi Knut,

> After updating my openSuSE Tumbleweed system I found lualatex broken. 
> "lualatex somefile" led to an error message:  LuaHBTeX, Version 1.12.0 
> complained that "lualatex.fmt was written by luatex".
> 
> Removing lualatex.fmt did not fix the problem.

My guess is you have a format for luahbtex hanging around in below your
$HOME. If you would have shown the actual log file, one could see it.

> "fmtutil --all" did not fix the problem.

A sign of the above.

> Then I changed the lualtex entry in /etc/texmf/web2c/fmtutil.cnf  to 
> "lualatex lua*hb*tex language.dat,language.dat.lua lualatex.ini" and started 
> "fmtutil --all" again. That fixed the problem, but I suspect that I only 
> found a quick workaround.
> 
> Is this a general TeXLive 2020 problem or an openSuSE bug?

Please report this to OpenSUSE. In TeX Live 2020 lualatex format is
based on luahbtex, but what OpenSUSE does I don't know.

Best

Norbert

--
PREINING Norbert                              https://www.preining.info
Accelia Inc. + IFMGA ProGuide + TU Wien + JAIST + TeX Live + Debian Dev
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