Am 27.09.2025 um 08:52 schrieb jbf:
It is not compiling for me. The usual kind of error message
A number should have been here; I inserted '0'. (If you can't figure out
why I
needed to see a number, look up 'weird error' in the index to The TeXbook.)
Try this version (which doesn't use the new brace method for registers).
%%%% begin example
\define[1]\ReverseChapterNumber
{\the\numexpr\somenamedheadnumber{chapter}{last}-\somenamedheadnumber{chapter}{current}\relax}
\setuphead
[chapter]
[numbercommand=\ReverseChapterNumber,conversion=A]
\starttext
\dorecurse{11}{\chapter{Chapter \VerboseNumber{#1}}}
\stoptext
%%%% end example
Wolfgang
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