On Thu, 31 Dec 2009, Ogam Géry wrote:

> Hi,
>
> I've got a problem with "\blackboard". When I use it in the title of an 
> enumeration (title=yes in setupenumerations), I get this error during 
> compilation:
> ! Incomplete \iffalse; all text was ignored after line x. <inserted text> \fi
>
> For instance:
> \starttext
> \defineenumeration[hello]
> \setupenumerations[hello][title=yes]
> \starthello{$\blackboard{ABCD}$}
> \stophello
> \stoptext
>
> Yet if I replace "\blackboard{ABCD}" with \reals (or \naturalnumbers, or 
> \integers etc.), it works fine. What's wrong?

Works fine in MkIV. In MkII, we need

\unexpanded\def\blackboard  #1{\mathortext\domathtext\donothing{\bbd#1}}

Hans, can you apply the attached patch for font-ini.mkii?

Aditya