 <p>There must be a problem with your version/install.</p> <p>Graphviz 2.28 on a windows system produces this output (11605x635px !):</p> <p><img src="https://i.stack.imgur.com/3XS0n.png" alt="graphviz output"></p> <p>Try <code>dot -version</code> to see version number and information about installed plugins &amp; config file.</p>