[NTG-context] Weird error

Wolfgang Schuster schuster.wolfgang at gmail.com
Wed Sep 10 18:53:55 CEST 2014


Am 10.09.2014 um 18:37 schrieb Aditya Mahajan <adityam at umich.edu>:

> Hi,
> 
> There was a question on TeX.SX about an error message
> http://tex.stackexchange.com/questions/200474/setuppagenumberinglocation-causes-problem-in-context
> 
> The following MWE shows the same error
> 
> \setupfootertexts[\namedheadnumber{chapter}]
> \setuppagenumbering[location=,alternative=doublesided]
> 
> \starttext
> 
> \completecontent
> 
> \chapter{Creating device driver}
> 
> \section{How to create the}
> 
> Chapter text
> 
> \stoptext
> 
> which gives
> 
> lua error       > error on line 8 in file /tmp/test.tex:
> 
> ...uild/src/tex/texmf-context/tex/context/base/strc-doc.lua:904: attempt to index field 'numbers' (a nil value)
> stack traceback:
>        ...uild/src/tex/texmf-context/tex/context/base/strc-doc.lua:904: in function 'getsectionnumber'
>        [\directlua]:1: in main chunk
> 
> The error is weird because it only appears when all parts of the minimal example are present. If I comment either or `location=,` or `alternative=doublesided` or `\completecontent` or `\section{...}`, the error goes away!
> 
> Any thoughts?


The error arises only when there is no aux file. A alternative to \namedheadnumber{XXX} is \getmarking[XXXnumber].

    \setupfootertexts[{\getmarking[chapternumber]}]

Wolfgang


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