[pstricks] pstricks-add: psCircleTangents: can't access node at postscript level

[Johannes Deutsch]

Hi all,

the following code as is, compiles fine with pdflatex.

If i uncomment line 16 the picture isn't drawn anylonger. 

Unfortunately i can't find any errors in the log, too.

Maybe someone around here can help me to find the error or maybe i can
help chasing a bug!?

With best regards

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\documentclass{article}
\usepackage{auto-pst-pdf}
\usepackage{pstricks-add,pstricks,pst-node}
\begin{document}

\psset{saveNodeCoors}
\begin{pspicture}[showgrid](-4,-4)(4,4)

    \pscircle(-2,-2){0.5}
    \psdot(2,2)
    \psCircleTangents(2,2)(-2,-2){0.5}

    \psdots(CircleT1)(CircleT2)

    \psline(2,2)(! N-CircleT1.x N-CircleT1.y)
    %\psline(2,2)(! N-CircleT2.x N-CircleT2.y) % line 16
\end{pspicture}

\end{document}