Hi,
I'm not by computer so cannot test, but you are not expected to use \text
like that. Either do
^{\tan} if it is the function tan (but I don't understand why one would do
that)
or
^{\mathrm {tan}}
if tan is just some abbreviation for tangent or so.
Does that work for you?
(In general, use \mtext instead of \text in math mode if you really need
some text in math.)
/Mikael
Den ons 24 dec. 2025 03:05Matthias Weber <[email protected]> skrev:
> Dear all,
>
> The combination of tagging and \startalign and \text leads to a
> compilation error.
>
> Minimal example:
>
> \setupbackend[format=pdf/ua-2]
> \setuptagging
> [state=start,
> preset=basic,
> level=2,
> option=interaction,
> ]
>
> \starttext
>
> \startformula
> \startalign
> \NC X^{\text{tan}} \NC = 0\NR
> \stopalign
> \stopformula
>
> \stoptext
>
> results in the attached error log.
>
>
> Commenting out the preamble or removing the alignment ot removing the
> \text{tan} compiles fine.
>
>
> Any workaround/fix will be much appreciated.
>
> Thanks, as always.
>
> Matthias
>
>
>
> tex error > tex error on line 1 in file ./Untitled.tex:
>
> lua error:
>
> registered function call [262]:
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:857: attempt to
> index a nil value (local 'a2')
> stack traceback:
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:857:
> in upvalue 'expandone'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:631:
> in upvalue 'expandfenced'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:769:
> in upvalue 'expandone'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:775:
> in upvalue 'expandone'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:1097:
> in upvalue 'expand'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:1044:
> in upvalue 'expandone'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:1113:
> in upvalue 'tomeaning'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lxml-mms.lmt:1193:
> in field 'verbose'
> ...-64/tex/texmf-context/tex/context/base/mkxl/math-tag.lmt:1168:
> in field 'gettextblob'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lpdf-tag.lmt:1193:
> in local 'action'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lpdf-tag.lmt:1553:
> in upvalue 'makeelement'
> ...-64/tex/texmf-context/tex/context/base/mkxl/lpdf-tag.lmt:2131:
> in upvalue 'structures_tags_handler'
> [string "local tonut = nodes.tonut..."]:25: in function <[string
> "local tonut = nodes.tonut..."]:12>
> (...tail calls...)
> ...-64/tex/texmf-context/tex/context/base/mkxl/node-shp.lmt:38: in
> function <...-64/tex/texmf-context/tex/context/base/mkxl/node-shp.lmt:37>
> (...tail calls...)
>
> 1 >>
> 2 \setupbackend[format=pdf/ua-2]
> 3 \setuptagging
> 4 [state=start,
> 5 preset=basic,
> 6 level=2,
> 7 option=interaction,
> 8 ]
> 9
> 10 \starttext
> 11
> mtx-context | fatal error: return code: 1
>
>
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>
> maillist : [email protected] /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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>
> ___________________________________________________________________________________
>
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : [email protected] /
https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
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