I just updated my ConTeXt distribution and it is working fine for me.

Try processing the following file:

\starttext
\input knuth
\stoptext

On Tue, Jan 16, 2024 at 5:30 PM luigi scarso <luigi.scarso@gmail.com> wrote:


On Tue, 16 Jan 2024 at 12:49, Shiv Shankar Dayal <shivshankar.dayal@gmail.com> wrote:
Please paste line no. 238 of your input file.

On Tue, Jan 16, 2024 at 4:11 PM Ursula Hermann <ursula.hermann@univie.ac.at> wrote:

Dear List,

 

After Compiling in the Folder:

 

This is LuaMetaTeX, Version 2.10.11 initex
(C:/Users/Hermann/Downloads/context-mswin/tex/texmf-context/tex/context/base/mkxl/cont-
en.mkxl(context.mkxl(syst-ini.mkxl
! Undefined control sequence.
<line 3.238>
  \immutable\defcsname\tocharacter
  \tabasciicode      \endcsname {\ } % \def\^^I{\ } tab


maybe I am wrong, but this looks like an error of  syst-ini.mkxl around line 3238
(I cannot update now )

--
luigi
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Respect,
Shiv Shankar Dayal