problem with foils and stepwise, empty pages generated.

Hello


Using foils together with texpower I try to achieve the following.

In the first step a list on the left side of the slide appears, then a
list on the right side, finally 3 words are added to the list on the
left side using the step command with an option

Below the code I use, when I start a slide with 
\foilhead{test of step}
(as I should) then additionally two empty are generated,
when I omit the \foilhead command everything is fine.

Can anybody help me?

Thanks

Uwe Brauer 



Here is the code


\foilhead{test of step}  %Problems because of this
\stepwise{


\begin{tabular}{cc}

 \begin{minipage}{12cm}
%\step
{Memoria}

\step{
\begin{enumerate}
\item Estadistica
                                
\item Álgebra lineal
\step[\value{step}=3]{\textcolor{purple}{(Numérico)}}
\item calculo de una variable
\step[\value{step}=3]{\textcolor{purple}{(Numérico)}}
\item Calculo de varias variables 
\item ecuaciones ordenarías 
\step[\value{step}=3]{\textcolor{purple}{(Numérico)}}

\end{enumerate}
 }

  \end{minipage}

&
\begin{minipage}{12cm}


\step[\value{step}=2]{
\begin{enumerate}
\setlength{\itemsep}{0.1cm}
\item Álgebra lineal
\item Calculo infinitesimal
\item Integración
\item Ecuaciones diferenciales
\item Estadística
\item \textcolor{purple}{Métodos numéricos}
\end{enumerate}
 }

\end{minipage}

\end{tabular}
}






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