Strange behavior of a macro

Strange behavior of a macro

[Fabrice Couvreur via ntg-context]

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Hello,
I don't understand why this macro works with this simple example but return
the following error if I use it for chapters in my book.
Thanks
Fabrice

%%%%
\setupbodyfont
   [newcomputermodern-book,11pt]

\unexpanded\def\N{\math{\mathbb{N}}\autoinsertnextspace}

\defineenumeration
   [test]
   [title=yes,
    text={Test},
    style=italic]

\starttext
\N
\starttest
\m{\forall n \in \N}
\stoptest
\stoptext

%%%%
tex error       > tex error on line 64 in file ./terminale_suites_2.tex:
Use of \N doesn't match its definition



<line 3.64>
              Soient \u, \v deux suites définies sur \N,
     \m{l} et \m{l'} deux réels.

54                 \startitem
55                   \u converge vers \m{l},
56                 \stopitem
57               \stopitemize
58               alors \m{l\geqslant 0}.
59             \stopproposition
60             \startremarque
61               Nous retiendrons que le passage à la limite sur une
inégalité stricte restitue une inégalité large.
62             \stopremarque
63             \startcorollaire
64 >>            Soient \u, \v deux suites définies sur \N, \m{l} et \m{l'}
deux réels.
65
66               Si
67
68               \startitemize
69                 \startitem
70                   les suites \u et \v convergent respectivement vers
\m{l} et \m{l'},
71                 \stopitem
72                 \startitem
73                   \m{\forall n \in\mathbb{N}, \thinspace u_n>v_n},
74                 \stopitem
If you say, e.g., '\def\a1{...}', then you must always put '1' after '\a',
since control sequence names are made up of letters only. The macro here
has not
been followed by the required stuff, so I'm ignoring it.
mtx-context     | fatal error: return code: 256
%%%%

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Re: Strange behavior of a macro

[Hans Hagen via ntg-context]

On 8/16/2021 4:28 PM, Fabrice Couvreur via ntg-context wrote:
> Hello,
> I don't understand why this macro works with this simple example but 
> return the following error if I use it for chapters in my book.
> Thanks
> Fabrice
> 
> %%%%
> \setupbodyfont
>     [newcomputermodern-book,11pt]
> 
> \unexpanded\def\N{\math{\mathbb{N}}\autoinsertnextspace}
> 
> \defineenumeration
>     [test]
>     [title=yes,
>      text={Test},
>      style=italic]
> 
> \starttext
> \N
> \starttest
> \m{\forall n \in \N}
> \stoptest
> \stoptext
> 
> %%%%
> tex error       > tex error on line 64 in file ./terminale_suites_2.tex: 
> Use of \N doesn't match its definition
maybe it gets redefined someplace?

just before the error you can say

\show\N or \meaning\N or \tracingall and see what the machinery expects

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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