[pstricks] exemple 15.1.10

[Denis Vergès]

Hello,
Trying to use example 15.1.10 from Herbert`s book (german version), I ran to the error :

Missing number, treated as zero.
Where is my error ?
Thanks.
Denis

 *File List*
 article.cls    2007/10/19 v1.4h Standard LaTeX document class
  size10.clo    2007/10/19 v1.4h Standard LaTeX file (size option)
inputenc.sty    2008/03/30 v1.1d Input encoding file
  latin1.def    2008/03/30 v1.1d Input encoding file
pstricks.sty    2011/04/23 v0.50 LaTeX wrapper for `PSTricks' (RN,HV)
   ifpdf.sty    2011/01/30 v2.3 Provides the ifpdf switch (HO)
ifluatex.sty    2010/03/01 v1.3 Provides the ifluatex switch (HO)
pstricks.tex    2011/04/23 v2.20 `PSTricks' (tvz,hv)
pst-xkey.tex    2005/11/25 v1.6 PSTricks specialization of xkeyval (HA)
 xkeyval.sty    2008/08/13 v2.6a package option processing (HA)
 xkeyval.tex    2008/08/13 v2.6a key=value parser (HA)
  pst-fp.tex    2011/04/23 v2.20 `PST-fp' (hv)
  xcolor.sty    2007/01/21 v2.11 LaTeX color extensions (UK)
   color.cfg    2007/01/18 v1.5 color configuration of teTeX/TeXLive
   dvips.def    1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
pst-plot.sty    2011/04/13 package wrapper for pst-plot.tex (hv)
pst-xkey.sty    2005/11/25 v1.6 package wrapper for pst-xkey.tex (HA)
 multido.sty    2004/05/17 package wrapper for PSTricks `multido.tex', (HV/RN)
 multido.tex    2010/05/14 v1.42 `multido' (tvz,hv)
pst-plot.tex    2011/04/13 1.29 `pst-plot' (tvz,hv)
%%%%%%%%%%%%%%
\documentclass{article}
\usepackage[latin1]{inputenc}
\usepackage{pstricks,pst-plot}
\def\Monat #1{%
	\ifcase#1\or Januar\or Februar\or März\or April\or Mai\or Juni\or%
	Juli\or August\or September\or Oktober\or November\or Dezember\fi%
}%
\def\Level#1{\ifcase#1\or Wenig\or Mittel\or Viel\fi}%
\def\psvlabel#1{\footnotesize\Level{#1}}%
\def\pshlabel#1{\rput[rb]{30}{\footnotesize\Monat{#1}}}%
\begin{document}
\psset{unit=0.8} 
\begin{center}
	\begin{pspicture}(0.5,1)(13,4)
	\psaxes[showorigin=false]{->}(13,4)
	\end{pspicture}
\end{center}
\end{document}
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tug.org/pipermail/pstricks/attachments/20120816/46bbf52a/attachment.html>