Hi Wolfgang,

In mkiv, even using \startanswer, \stopanswer (and the same syntax with questions and hints) the blocks mechanism seems to be broken.
The error message is still the following:

\dostopnormalblock ...meter \c!after \par \egroup 
                                                  
<argument> ...fact that $2\times 5 = 10$. \dostopnormalblock 
                                                  \dostartnormalblock {hint}...
\dodowithpar ...dler \v!construction \endcsname #1
                                                  \csname \??constructionsto...

When I understand a little bit more about that mechanism I’ll do other testings and eventually ask Hans about what has been changed regarding blocks.
Best regards: OK

On 9 janv. 2014, at 18:41, Wolfgang Schuster <schuster.wolfgang@gmail.com> wrote:

> […]
> When you enumerations in this form
> 
> \beginanswer
> \answer $10$
> \endanswer
> 
> you have to finish the paragraph, e.g. by adding \par
> 
> \beginanswer
> \answer $10$\par
> \endanswer
> 
> or better use the start/stop commands for the enumeration.
> 
> \beginanswer
> \startanswer
> $10$
> \stopanswer
> \endanswer
> 
> Wolfgang
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