ERROR in map preview: There was an error creating your map preview.
ArgumentError: insufficient/odd number of points specified: 2
/usr/lib/ruby/gems/1.8/gems/rmagick-1.15.12/lib/rvg/embellishable.rb:135:in `polypoints'
/usr/lib/ruby/gems/1.8/gems/rmagick-1.15.12/lib/rvg/embellishable.rb:166:in `initialize'
/usr/lib/ruby/gems/1.8/gems/rmagick-1.15.12/lib/rvg/embellishable.rb:324:in `new'
/usr/lib/ruby/gems/1.8/gems/rmagick-1.15.12/lib/rvg/embellishable.rb:324:in `polyline'
/home/guru3/map-preview/lib/map_preview/renderer.rb:85:in `_render_walls'
/home/guru3/map-preview/lib/map_preview/renderer.rb:85:in `each'
/home/guru3/map-preview/lib/map_preview/renderer.rb:85:in `_render_walls'
/home/guru3/map-preview/lib/map_preview/renderer.rb:128:in `_group'
/home/guru3/map-preview/lib/map_preview/renderer.rb:83:in `_render_walls'
/home/guru3/map-preview/lib/map_preview/renderer.rb:59:in `render'
/home/guru3/maptools.armagetronad.net/map-preview/map-preview.rhtml:32