render test error. Help me

Hello I am contacting from Mongolia. Thank’s your help.
i am trying create local transport map like and i am following this lesson.
I have one problem on step 3.2 Render the Tiles. if know solutions help me. I am beginner and my English sow bad sorry.

pt@ubuntu:~/mapnik$ /home/pt/mapnik/mapnik_pt.xml image.png -c 106 47.9 -z 10 -d 800 400 --no-open -f png256
Traceback (most recent call last):
File “/usr/local/bin/”, line 238, in
File “/usr/local/bin/”, line 228, in main
nik_map = ComposeDebug(mapfile,**options.dict)
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 263, in init
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 69, in init
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 280, in build
builder = super(ComposeDebug,self).build()
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 113, in build = builder.build_map(self.width,self.height)
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 124, in build_map
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 116, in load_mapfile
File “/usr/local/lib/python2.6/dist-packages/mapnik_utils/”, line 74, in load_xml
return mapnik.load_map(m,self.mapfile)
RuntimeError: Required attribute ‘type’ is missing in PolygonPatternSymbolizer in style ‘landuse_overlay’