[pstricks] Pst-pdf and psmatrix ??

[Alain Matthes]

Hello

This code compile fine :with tex & ghostscript under texshop

\documentclass{article}
\usepackage{pstricks,pst-node}
%\usepackage{pst-pdf}
%\usepackage[upright]{fourier}
\usepackage{amsmath} % c'est pour /text evt complémentaire
\DeclareMathSymbol{@}{\mathord}{letters}{"3B}
\usepackage[frenchb]{babel}

\makeatletter

\newcommand{\arbre}[4]{%
\begin{pspicture}(0,0)(5,5)
\newcounter{nb}\setcounter{nb}{0}

\@for\liste:=#1\do{%
    \ifcase\thenb
     \edef\@S{\liste}%
       \or
      \edef\@E{\liste}%
      \fi
       \stepcounter{nb}%
    }%fin du do

\setcounter{nb}{0}

   \@for\liste:=#2\do{%
    \ifcase\thenb
       \edef\@SS{\liste}%
       \or
       \edef\@SE{\liste}%
        \or
       \edef\@ES{\liste}%
      \or
       \edef\@EE{\liste}%
      \fi
       \stepcounter{nb}%
    }%fin du do
\setcounter{nb}{0}

   \@for\liste:=#3\do{%
    \ifcase\thenb
       \edef\@PS{\liste}%
       \or
       \edef\@PE{\liste}%
       \fi
      \stepcounter{nb}%
    }%fin du do

\setcounter{nb}{0}

   \@for\liste:=#4\do{%
    \ifcase\thenb
       \edef\@PSS{\liste}%
       \or
       \edef\@PSE{\liste}%
        \or
       \edef\@PES{\liste}%
      \or
       \edef\@PEE{\liste}%
      \fi
       \stepcounter{nb}%
    }%fin du do

\begin{psmatrix}[rowsep=.2cm,colsep=2cm]
             &               & \@SS   \\
              & \@S     &        \\
             &               & \@SE      \\
$\bullet$   &           &           \\
              &              & \@ES      \\
              & \@E     &        \\
             &           & \@EE   \\
\scriptsize
\psset{shortput=nab,arrows=->,labelsep=2pt,nodesep=2pt,nrot=:U}


\ncline{4,1}{2,2}\ncput*{$\@PS$}
\ncline{4,1}{6,2}\ncput*{$\@PE$}

\ncline{2,2}{1,3}\ncput*{$\@PSS$}
\ncline{2,2}{3,3}\ncput*{$\@PSE$}

\ncline{6,2}{5,3}\ncput*{$\@PES$}
\ncline{6,2}{7,3}\ncput*{$\@PEE$}

\end{psmatrix}
\end{pspicture}

}
\makeatother

\begin{document}

\DecimalMathComma

%\arbre{A,$\overline{\text{B}}$} {E,F,G,H} {{0,2},x} {{0,3},y,z,{0,8}}
\arbre{A,$\overline{\text{B}}$}{E,F,G,H}{0 at 2,x}{0 at 3,y,z,0 at 8}
\end{document}


but if i try with \usepackage{pst-pdf} and ps4pdf i've this error :

Preview: PDFoutput 1
LaTeX Info: Redefining \dots on input line 92.
\c at nb=\count124
! Misplaced alignment tab character &.
\arbre ...gin {psmatrix}[rowsep=.2cm,colsep=2cm] &
                                                    & \@SS \\ & \@S &  
\\ & & ...
l.97 ...e{\text{B}}$}{E,F,G,H}{0 at 2,x}{0 at 3,y,z,0 at 8}

?
! Emergency stop.
\arbre ...gin {psmatrix}[rowsep=.2cm,colsep=2cm] &
                                                    & \@SS \\ & \@S &  
\\ & & ...
l.97 ...e{\text{B}}$}{E,F,G,H}{0 at 2,x}{0 at 3,y,z,0 at 8}

End of file on the terminal!

but the file  arbre2bis-pics.pdf is fine but arbre2.dvi is empty and  
i don't have a arbre2.pdf

Alain Matthes