[NTG-context] Typearea module fails with “Missing number”

[Wolfgang Schuster]

Marco Patzer via ntg-context schrieb am 29.08.2022 um 09:49:
> On Mon, 29 Aug 2022 09:30:34 +0200
> Marco Patzer via ntg-context <ntg-context at ntg.nl> wrote:
>
>> The typearea module fails on LMTX (runs ok with MkIV):
>>
>>    tex error       > tex error on line 89 in file
>> /usr/local/share/context-lmtx/tex/texmf-modules/tex/context/third/typearea/t-typearea.tex:
>> Missing number, treated as zero
> Sorry, forgot the MWE:
>
>    \usemodule[typearea]
>    \starttext\null\stoptext

To fix the module you have to change the line

\edef\Ratio{\withoutpt{\the\dimexpr2\paperheight/(\PageWidth/32768)\relax}}

with (remove one pair of curly braces)

\edef\Ratio{\withoutpt\the\dimexpr2\paperheight/(\PageWidth/32768)\relax}


Similar problems can happens with other modules because many of them are 
outdated
and they should be either updated or removed (the files can still be 
archived).

Wolfgang