Am 10.01.2012 um 12:02 schrieb Hans van der Meer:

> This is the error when installing the latest beta:

Works here:

mtx-context     | current version: 2012.01.09 10:08

> ! Undefined control sequence.
> 
> system          > tex > error on line 808 in file /Users/hans/TeX/context-new/tex/texmf-context/tex/context/base/context.mkiv: Undefined control sequence ...
> 
> 
> <argument> \??bj 
> 
> \setsomevalue #1#2->\expandafter \def \csname #1
>                                                #2\endcsname 
> \p!doassign ...fter \setsomevalue \fi \fi {#1}{#2}
>                                                  {#3}
> \xprocesscommaitem ...@relax@ #1==\empty \@relax@ 
>                                                  \doubleexpandafter \xproce...
> <argument> \c!n =3, \c!width 
>                             =1em, \c!height =1ex, \c!depth =\!!zeropoint , ...
> \xdogetparameters #1]->\xprocesscommaitem #1
>                                            ,],\@relax@ 
> l.808    \c!color=]
> 
> 
> Is it possible the error is in file typo-mar.mkiv? There I find a macro call   
>   \usemargindatastyleandcolor\c!style\c!color
> but searching the sourcesfor its definition does not reveal it.
> Could it be forgotten?

No, \use…styleandcolor is a generated command from \installcommandhandler (see mult-aux.mkiv).

Wolfgang