Crashes on Windows

[Themanwithoutaplan]

There seems to be a problem with the way multiprocessingis being used. Haven't pasted the whole traceback just what seems to be the key part.
...

self = <multiprocessing.forking.ForkingPickler instance at 0x0000000002C29BC8>
obj = <function thread_func at 0x0000000002B8C898>, name = 'thread_func'
pack =

def save_global(self, obj, name=None, pack=struct.pack):
    write = self.write
    memo = self.memo

    if name is None:
        name = obj.__name__

    module = getattr(obj, "__module__", None)
    if module is None:
        module = whichmodule(obj, name)

    try:
        __import__(module)
        mod = sys.modules[module]
        klass = getattr(mod, name)
    except (ImportError, KeyError, AttributeError):
        raise PicklingError(
            "Can't pickle %r: it's not found as %s.%s" %

          (obj, module, name))

E PicklingError: Can't pickle <function thread_func at 0x0000000002B8C
898>: it's not found as wd.parallel.thread_func

C:\Python27\Lib\pickle.py:748: PicklingError

...