Wolfgang Zillig wrote:
> Hello,
> 
> when I add \hyphenation{Voll-stön-dig-keit} into my tex file I get the 
> following error:
> 
> (C:\texmf\tex\context\base\xtag-utf.tex
> loading         : Context XML Macros (UTF-8)
> )
> ! Not a letter.
> \@default@adiaeresis ->\char 228
>                                \utfunihashglyph ...r \utfdiv 
> {#1}}{#1}\endcsname
>                                                  \fi
> <inserted text> Voll-stä
>                         n-dig-keit
> \hyphenation ...malhyphenation {\the \scratchtoks
>                                                  }\endgroup
> l.118 \hyphenation{Voll-stän-dig-keit}
>                                      ?
> 
> 
> Any ideas?

Perhaps your input is latin1, only pretending to be utf-8.
In a latin-1 text editor, it should look like this:

   \hyphenation{Voll-stän-dig-keit}

But this sort of stuff is tricky to get right in e-mail,
and I am just guessing. What I tried is attached, and that
worked for me.

Cheers, Taco