Am 07.11.2010 um 19:42 schrieb Vedran Miletić:

> Hi,
>
> I would like to define something like this:
> \def\startSolution{\startmode[solutions]...}
> \def\stopSolution{...\stopmode}
>
> But when I use \startSolution and \stopSolution, and mode solutions isn't enabled, I get something like
> Runaway argument?
> aaa \stopSolution \stoptext
> ! File ended while scanning use of \dostopmode.
>
> system          > error on line 0 in file : File ended while scanning use of \dostopmode ...
>
> What's the proper way of doing this?

Use \startmode[...] ... \stopmode in your document without your own Solution environment or define the environment as

\definebuffer[Solution][local=yes]

\startmode[solutions]
\setupbuffer[Solution][local=no]
\stopmode

\starttext

...

\startSolution
solution
\stopSolution

...

\stoptext