timo@styx ~/Downloads/SolderingTutorial (git)-[master] % make
latexmk -lualatex --jobname=ArrowSMD/manual/ArrowSMD_de "LaTeX_config/solderingTut"
Rc files read:
  ./latexmkrc
Latexmk: This is Latexmk, John Collins, 29 September 2020, version: 4.70b.
Latexmk: applying rule 'lualatex'...
Rule 'lualatex': The following rules & subrules became out-of-date:
      'lualatex'
------------
Run number 1 of rule 'lualatex'
------------
------------
Running 'lualatex  -recorder --jobname="ArrowSMD/manual/ArrowSMD_de"  "LaTeX_config/solderingTut.tex"'
------------
This is LuaHBTeX, Version 1.12.0 (TeX Live 2020/Arch Linux)
 restricted system commands enabled.
(./LaTeX_config/solderingTut.tex
LaTeX2e <2020-10-01> patch level 2


 L3 programming layer <2020-12-03> xparse <2020-03-03>
(/usr/share/texmf-dist/tex/latex/koma-script/scrartcl.cls
Document Class: scrartcl 2020/09/21 v3.32 KOMA-Script document class (article)
(/usr/share/texmf-dist/tex/latex/koma-script/scrkbase.sty
(/usr/share/texmf-dist/tex/latex/koma-script/scrbase.sty
(/usr/share/texmf-dist/tex/latex/koma-script/scrlfile.sty
(/usr/share/texmf-dist/tex/latex/koma-script/scrlfile-hook.sty
(/usr/share/texmf-dist/tex/latex/koma-script/scrlogo.sty)))
(/usr/share/texmf-dist/tex/latex/graphics/keyval.sty)))
(/usr/share/texmf-dist/tex/latex/koma-script/tocbasic.sty)
(/usr/share/texmf-dist/tex/latex/koma-script/scrsize10pt.clo)
(/usr/share/texmf-dist/tex/latex/koma-script/typearea.sty

Package typearea Warning: Bad type area settings!
(typearea)                The detected line width is about 36%
(typearea)                larger than the heuristically estimated maximum
(typearea)                limit of typographical good line width.
(typearea)                You should e.g. decrease DIV, increase fontsize
(typearea)                or change papersize.

)) (/usr/share/texmf-dist/tex/latex/fontspec/fontspec.sty
(/usr/share/texmf-dist/tex/latex/l3packages/xparse/xparse.sty
(/usr/share/texmf-dist/tex/latex/l3kernel/expl3.sty
(/usr/share/texmf-dist/tex/latex/l3backend/l3backend-luatex.def))
(/usr/share/texmf-dist/tex/latex/l3packages/xparse/xparse-generic.tex))
(/usr/share/texmf-dist/tex/latex/fontspec/fontspec-luatex.sty
(/usr/share/texmf-dist/tex/latex/base/fontenc.sty)
(/usr/share/texmf-dist/tex/latex/fontspec/fontspec.cfg)))
(/usr/share/texmf-dist/tex/latex/microtype/microtype.sty
(/usr/share/texmf-dist/tex/latex/microtype/microtype-luatex.def)
(/usr/share/texmf-dist/tex/latex/microtype/microtype.cfg))
(/usr/share/texmf-dist/tex/latex/graphics/graphicx.sty
(/usr/share/texmf-dist/tex/latex/graphics/graphics.sty
(/usr/share/texmf-dist/tex/latex/graphics/trig.sty)
(/usr/share/texmf-dist/tex/latex/graphics-cfg/graphics.cfg)
(/usr/share/texmf-dist/tex/latex/graphics-def/luatex.def)))
(./LaTeX_config/BK-solderingtut.sty

LaTeX Warning: You have requested package `LaTeX_config/BK-solderingtut',
               but the package provides `BK-solderingtut.sty'.

(/usr/share/texmf-dist/tex/latex/booktabs/booktabs.sty)
(/usr/share/texmf-dist/tex/latex/tools/tabularx.sty
(/usr/share/texmf-dist/tex/latex/tools/array.sty))
! Argument of \reserved@a has an extra }.
<inserted text>
\par
l.48 }

?