I'll try to sort out a minimal example; unfortunately neither of those
suggestions worked.

In the meantime, here's some more info from the log file:

-----
(chapter.tex
! LuaTeX error
.../context/tex/texmf-context/tex/context/base/strc-doc.lua:156: attempt to
index local 'metadata' (a number value)
stack traceback:
        .../context/tex/texmf-context/tex/context/base/strc-doc.lua:156: in
function 'load'
        .../context/tex/texmf-context/tex/context/base/strc-doc.lua:167: in
function '__index'
        .../context/tex/texmf-context/tex/context/base/strc-doc.lua:143: in
function 'save'
        .../context/tex/texmf-context/tex/context/base/strc-doc.lua:371: in
function 'somelevel'
        [string "\directlua "]:1: in main chunk.

system          > tex > error on line 1 in file chapter.tex: LuaTeX error
 ...

 1 >>  \chapter[ch:this]{My first chapter}
-----

It seems to be a mkiv issue; when I attempted to typeset the file(s) with
texexec (mkii), I had no problem.

Thanks again,
Alasdair



On Fri, Mar 1, 2013 at 8:54 PM, Marco Patzer <homerow@lavabit.com> wrote:

> On 2013–03–01 Alasdair McAndrew wrote:
>
> > Arrgh: more problems.  I've downloaded and installed context standalone
> > (version 2013.02.26 00:17).  Now when I run context I get an error (for
> the
> > first time ever) when it reaches a chapter heading:
> >
> > l.1 ...[ch:this]{My first chapter}
> >
> > ? h
> > The lua interpreter ran into a problem, so the
> > remainder of this lua chunk will be ignored.
> >
> > I have the following setups:
> >
> > \def\chap#1#2{\vbox{\darkgreen Chapter
> > #1\crlf\framed[frame=off,topframe=on]{#2}}}
> > \def\uchap#1#2{#2}
> >
> >
> \setuphead[chapter][command=\chap,style=bfd,after={\blank[1cm]},textcolor=darkgreen,numbercolor=darkgreen]
> >
> > None of this has ever given me any problems before.
>
> It's easier to tell with a minimal example. But here's a guess. Try
>
>   \unexpanded\def#1#2\chap{…}
>
> or
>
>   \define[2]\chap{…}
>
>
> Marco
>
>
> ___________________________________________________________________________________
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> the Wiki!
>
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>
> ___________________________________________________________________________________
>



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