Hi,

Sorry for perhaps silly question, but I receive and error for this code:

\subsubsubject{El problema de la paraula}

\startitemize[1]
\item $\pi(x^{-1}) = \pi(x)^{-1}$ per a tot $x \in X$.
\item Per a tota paraula $w = w_1 \ldots w_r$ sobre $X \cup X^{-1}$,
\startformula
\pi(w) = \pi(w_1) \cdots \pi(w_r) \in G.
\stopformula
\stopitemize

that in the first item should be one less $:

subsubsubject   : - El problema de la paraula
! Argument of \dodoregister has an extra }.
<inserted text>
                \par
<to be read again>
                   }
\doattributes ...name #1#2\@EA \endcsname \fi {#4}
                                                  \dostopattributes
\dolistitem ...evel \c!style \c!color {\listitem }
                                                  \fi \fi 
}\ifconditional \f...

\complexdoitemgroupitem ...obreak \fi \dolistitem
                                                  \relax \ifconditional 
\pac...
<to be read again>
                   $
l.237 \item $
             \pi(x^{-1}) = \pi(x)^{-1}$ per a tot $x \in X$.
? x


The whole file is attached.


What's the problem. Sorry I don't see....


Xan.