Dear List, I would like to know, what i can do, to geht all Math macros with MkII : \showmathcharacters in my Editor: WinEdt. I tried to compile it, but there is a mistake. I tried with \starttext and \stoptext, didn't work. Command Line: context.exe --synctex=-1 "Math 2.tex" Startup Folder: C:\Users\Administrator resolvers | formats | executing runner 'run luatex format': C:/texlive/2020/bin/win32/luatex --jobname="Math 2" --fmt=C:/texlive/2020/texmf-var/luatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luatex/cont-en.fmt --lua=C:/texlive/2020/texmf-var/luatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luatex/cont-en.lui cont-yes.mkiv --c:currentrun=1 --c:fulljobname="./Math 2.tex" --c:input="./Math 2.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:synctex="-1" --c:texmfbinpath="C:/texlive/2020/bin/win32" This is LuaTeX, Version 1.12.0 (TeX Live 2020/W32TeX) system commands enabled. open source > level 1, order 1, name 'C:/texlive/2020/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2020.03.10 14:44 MKIV beta fmt: 2021.1.18 int: english/english system > system > 'cont-new.mkiv' loaded open source > level 2, order 2, name 'C:/texlive/2020/texmf-dist/tex/context/base/mkiv/cont-new.mkiv' system > beware: some patches loaded from cont-new.mkiv close source > level 2, order 2, name 'C:/texlive/2020/texmf-dist/tex/context/base/mkiv/cont-new.mkiv' system > files > jobname 'Math 2', input './Math 2', result 'Math 2' fonts > latin modern fonts are not preloaded languages > language 'en' is active system > synctex functionality is enabled, expect 5-10 pct runtime overhead! open source > level 2, order 3, name 'C:/Users/Administrator/Math 2.tex' tex error > tex error on line 1 in file C:/Users/Administrator/Math 2.tex: ! Undefined control sequence l.1 \showmathcharacters 1 >> \showmathcharacters mtx-context | fatal error: return code: 1 _____________________________________________________________________ ConTeXt Compilation Report (Pages: 0) Errors: 1 Warnings: 0 Bad Boxes: 0 ___________________________________________________________ Many thanks Uschi Hermann