(bin3)andy@pdq2s-MacBook-Pro-2 iron-horse default-r1084 (tip) ~/Documents/OTTD_graphics/Iron_Horse/iron-horse $ make pw=1

[GENERATE]

[BUILD] build_iron_horse.py

[RENDER GRAPHICS] render_graphics.py

[IMPORT VEHICLES] iron_horse.py

3.89s

[RENDER LANG] render_lang.py

0.02s

[RENDER NML & NFO] render_nml_nfo.py

Rendering header

Rendering cargo_table

Rendering railtype_table

Rendering disable_default_vehicles

Rendering chaplin

Traceback (most recent call last):

  File "src/build_iron_horse.py", line 30, in <module>

    render_nml_nfo.main()

  File "/Users/andy/Documents/OTTD_graphics/Iron_Horse/iron-horse/src/render_nml_nfo.py", line 161, in main

    render_dispatcher(consists, renderer=render_consist_nml_nfo)

  File "/Users/andy/Documents/OTTD_graphics/Iron_Horse/iron-horse/src/render_nml_nfo.py", line 128, in render_dispatcher

    pool.map(renderer, items)

  File "/Users/andy/Documents/workspace/buildout.python/parts/opt/lib/python3.4/multiprocessing/pool.py", line 260, in map

    return self._map_async(func, iterable, mapstar, chunksize).get()

  File "/Users/andy/Documents/workspace/buildout.python/parts/opt/lib/python3.4/multiprocessing/pool.py", line 599, in get

    raise self._value

  File "/Users/andy/Documents/workspace/buildout.python/parts/opt/lib/python3.4/multiprocessing/pool.py", line 383, in _handle_tasks

    put(task)

  File "/Users/andy/Documents/workspace/buildout.python/parts/opt/lib/python3.4/multiprocessing/connection.py", line 206, in send

    self._send_bytes(ForkingPickler.dumps(obj))

  File "/Users/andy/Documents/workspace/buildout.python/parts/opt/lib/python3.4/multiprocessing/reduction.py", line 50, in dumps

    cls(buf, protocol).dump(obj)

_pickle.PicklingError: Can't pickle <class 'dict_keys'>: attribute lookup dict_keys on builtins failed