#5 problem with prosper and \psgrid

[Anonymous]

Hi,

I have a problem with prosper.cls and pstricks.sty:
\psgrid does not work, LaTeX reports an error and the
resulting postscript file is broken. With article.cls
everything works fine. Please help.

Many thanks in advance,
Christoph

I use prosper version:

\typeout{CVSId: $Id: prosper.cls,v 1.5 2001/01/31
10:20:44 exupery Exp $}

The error message is:

! Undefined control sequence.
\GenericError ...
#4
\errhelp \@err@ ...
l.15 \end
{pspicture}
?

demonstration:

\documentclass{prosper}
%\documentclass{article}

\usepackage{pstricks}

\begin{document}
\begin{slide}{test}
This is a test.
\end{slide}

\begin{slide}{psgrid}

\begin{pspicture}(-5,-5)(5,5)
\psgrid(-5,-5)(5,5)
\end{pspicture}

\end{slide}

\end{document}