With the following versions of ConTeXt, LuaTeX, and t-bib:

MTXrun | main context file:
/opt/context/beta/tex/texmf-context/tex/context/base/context.tex
MTXrun | current version: 2009.04.21 16:11
This is LuaTeX, Version beta-0.40.0-2009042222 luatex.web >= v2344
%D \module
%D   [       file=t-bib,
%D        version=2009.04.17,

Using the following in a file named bibliography.bib:

@TechReport{WhoAmI2009,
  author =       {Who Am I},
  title =        {Foo, Bar, Baz},
  institution =  {Boo},
  year =         {2009},
  number =       {42},
  month =        {January}
}

With the following as my test file:

\usemodule[bib]
\usemodule[bibltx]
\setupbibtex[database=./bibliography]
\setuppublications[sorttype=bbl,criterium=all]
\setuppublications[numbering=short,autohang=yes,refcommand=key]

\starttext
\input knuth \cite[WhoAmI2009]
\stoptext

I get the following error:

! Undefined control sequence.
<argument> ... [\bibrefprefix ][\sectionseparator
                                                  ]
\expanded ...\long \xdef \@@expanded {\noexpand #1
                                                  }\@@expanded
\preparebibreflist ...refix ][\sectionseparator ]}
                                                  \storeitem
\gotobiblink ...brefprefix \preparebibreflist {#2}
                                                  \global \bibreffoundfalse
...
\next1 #1,->\dobibkeyref {#1}
                             \doprocesscommaitem
\doprocesscommalist ...item \gobbleoneargument #1,
                                                  ]\relax \global \advance
\...
...
l.9 \stoptext

If I change \cite[WhoAmI2009] to \cite[short][WhoAmI2009], then the document
will build without errors if there are no intermediate files but without
actually inserting the citation key: I just get the empty pair []. If there
are intermediate files, then I get the familiar:

! Undefined control sequence.
<argument> ... [\bibrefprefix ][\sectionseparator
                                                  ]
\expanded ...\long \xdef \@@expanded {\noexpand #1
                                                  }\@@expanded
\preparebibreflist ...refix ][\sectionseparator ]}
                                                  \storeitem
\gotobiblink ...brefprefix \preparebibreflist {#2}
                                                  \global \bibreffoundfalse
...
\next1 #1,->\dobibshortref {#1}
                               \doprocesscommaitem
\doprocesscommalist ...item \gobbleoneargument #1,
                                                  ]\relax \global \advance
\...
...
l.8 \input knuth \cite[short][WhoAmI2009]

I hope this helps!

Kevin

On Tue, Apr 21, 2009 at 8:12 AM, Hans Hagen <pragma@wxs.nl> wrote:

> Thomas A. Schmitz wrote:
>
>  1. The problem with the bib module persists. I don't get any errors
>> anymore about undefined control sequences, the bbl file is loaded, but no
>> output is produced. I hope I can produce a minimal test file tomorrow,
>> unless you already have a test.
>>
>
> a test file would be handy indeed as i have no clue how to invoke the bug
>
>
> -----------------------------------------------------------------
>                                          Hans Hagen | PRAGMA ADE
>              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
>                                             | www.pragma-pod.nl
> -----------------------------------------------------------------
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>