I came across an issue in context (context ver. 2011.05.18 22:26, LuaTeX
ver: beta-0.65.0-2010121421 (rev 4034) ) when trying to cite a bibliography
item having an author with a German umlaut "ä"

Compiling the short example below, produces the following output and then
-------------------------------------
...
system > begin file test.tex at line 3
publications > loading database from test.bbl
(test.bbl
! Undefined control sequence.
\@@pbs ->Tr\0
6
\dostartpublication ...@@pby \noexpand \or \@@pbs
\noexpand \or \@@pbn \noex...
l.9 \stoppublication

)
backend > xmp > using file
'M:/Programs/context/tex/texmf-local/tex/context/base/lpdf-pdx.xml'
pages > flushing realpage 1, userpage 1, subpage 1
system > end file test.tex at line 5
...
mtx-context | fatal error: return code: 1
----------------------

The strange thing is that when I change the Tr\"{a}ger to Schr\"{a}ger,
everything works just fine.
Does anybody know what's going on here?!

Julian


---test.tex---------
\setuppublications[alternative=apa,sorttype=bbl]
\setupbibtex[database=test.bib]
\starttext
I'd like to cite \cite[Entry1].
\stoptext


-----test.bib:---this one produces an error-----
@misc{Entry1,
author = {Tr\"{a}ger, D},
title = {{Some Document}},
year = {2006}
}
----------------------

----test.bib--this works---
@misc{Entry1,
author = {Schr\"{a}ger, D},
title = {{Some Document}},
year = {2006}
}
----------------------

-- 
Julian Becker
Institut für Angewandte Physik, R.123
Westfälische Wilhelms-Universität Münster
Corrensstr. 2/4
48149 Münster / Westfalen
Tel. 0251 83-3 61 53
Mob. 0151 599 848 29
e-mail: j_beck16@uni-muenster.de

"Keep thy heart with all diligence; for it is the wellspring of life."