@@ -1568,7 +1568,8 @@ class DotWidget(gtk.DrawingArea):

         else:

             xdotcode, error = p.communicate(dotcode)

         error = error.rstrip()

-        sys.stderr.write(error + '\n')

+        if error:

+            sys.stderr.write(error + '\n')

         if p.returncode != 0:

             dialog = gtk.MessageDialog(type=gtk.MESSAGE_ERROR,

                                        message_format=error,