On Wed, 10 Sep 2014, Wolfgang Schuster wrote:


Am 10.09.2014 um 18:37 schrieb Aditya Mahajan <adit...@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]}]

Thanks!

Aditya
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