# Undefined control sequence problem with \pstree

I installed the latest MikTex2.9 and tested the following simple code trying to create a node in a tree diagram.

\documentclass{article}
\usepackage{graphics,graphicx}
\usepackage{pstricks,pst-node,pst-tree}
\begin{document}
\end{document}


But I received the following error:

"Undefined controlled sequence. \pstree[radius=3pt]{\Tcircle{X}}"


Any hints what went wrong? Thanks!

The first error is most likely the usage of pdftex instead of latex or xelatex.

This can be fixed with \usepackage{auto-pst-pdf}, if --shell-escape is enabled (i.e. the \write18 feature)

The \pstree command needs at least the start node (root) and a successor node, which is missing in the above document. I just choose \TC* for example, i.e. the syntax is

\pstree[options]{root}{successor}


Of course, {successor} can be left empty, but that's no tree actually ;-)

Here's the working document:

\documentclass{article}
\usepackage{graphicx}
\usepackage{pst-tree}
\usepackage{auto-pst-pdf}
\begin{document}
\end{document}


• @Chrisstian Hupfer: May be you should add it's necessary to use use the --enable-write18 or -shell-escape switch to make it work. Also, it is enough to load pst-tree, as it loads the first two packages. – Bernard Apr 11 '16 at 21:36
• @Bernard: Thanks, I've added your recommendations. – user31729 Apr 11 '16 at 21:54

You need at least an empty node where the root points to:

\documentclass{article}
\usepackage{pst-tree}
\begin{document}