[pstricks] showNode in pst-node package

[Christoph Bersch]

Zitat von Herbert Voss <Herbert.Voss at fu-berlin.de>:
> Am 16.06.2014 09:32, schrieb Patrice MÉGRET:
>
>> I cannot use showNode. With pst-node v1.33. I don’t see the problem.
>
> Patrice,
>
> try the version from
> http://texnik.dante.de/tex/generic/pst-node/

I also wanted to try that, but even with the simplest document

\documentclass{report}
\usepackage{pst-node}
\listfiles
\begin{document}
\begin{pspicture}[showgrid](5,5)
\psset{showNode}
\pnode(1,1){N1}
\end{pspicture}
\end{document}

I get the error

Error: /invalidfileaccess in --file--
Operand stack:
    (test.nodes)   (w)

Don't know why this happens.

Christoph