Jairo A. del Rio schrieb am 04.08.2020 um 06:07:

> The following worked some days ago. Now it crashes:
>
> \setuphead[chapter][alternative=middle,textstyle=\cap,numbercommand=\WORDS]
> \setuphead[section][sectionsegments=section,align=middle,textstyle={\bf},conversion=R,numbercommand={\bf}]
> \setuphead[subsection][numbercommand=,textstyle={\it},sectionsegments=subsection,conversion=n]
> \starttext
> \startchapter[title=Dummy chapter]
> \startsection[title=Dummy section]
> \startsubsection[title=Dummy subsection]
> \input knuth
> \stopsubsection
> \stopsection
> \stopchapter
> \stoptext

This caused by the second related problem mentioned in my answer, you
get the error message for the \cap and \WORDS command.

In this case there is a easy fix and also better chapter setup:

\setuphead
   [chapter]
   [alternative=middle,
    textstyle=cap,
    numberstyle=WORD]

Wolfgang