[NTG-context] modules maps fails

[Diego Depaoli]

Hi all,
trying build the example at http://wiki.contextgarden.net/Modules/Maps
I get the following cryptic error

(/home/diego/tex/texmf-context/tex/context/base/type-siz.tex)
(/home/diego/tex/texmf-context/tex/context/base/type-one.tex)
(/home/diego/tex/texmf-context/tex/context/base/type-akb.tex)
(/home/diego/tex/texmf-context/tex/context/base/type-gyr.tex)
! Font \*map7ptmmmrss*:=zeurm10 at 7.0pt not loadable: Metric (TFM)
file not found.
<to be read again>
                   \relax
\xxdododefinefont ...tspec {#4}\newfontidentifier
                                                  \let \localrelativefontsiz...

\dodosetmathfamilyB ...amily \fontsize \endcsname
                                                  \else \ifcsname \fontclass...

\dosetmathfamily ...athfamily \scriptscriptfont #1
                                                  \let \fontbody #3\dodosetm...
<inserted text> ...ptscriptface \c!mr \mrfallback
                                                  \dosetmathfamily \mifam \t...

\synchronizemath ...athfonts \the \mathstrategies
                                                  \fi
...
l.118 \setupbodyfont [map,10pt]

?
! Emergency stop.

Something similar happens in live too.
What I'm wrong?

Regards

-- 
Diego Depaoli