Python error

"""
Traceback (most recent call last):
  File "C:\Python34\lib\multiprocessing\pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "C:\Python34\lib\multiprocessing\pool.py", line 44, in mapstar
    return list(map(*args))
  File "C:\Python34\lib\site-packages\himawaripy-1.1-py3.4.egg\himawaripy\himawaripy.py", line 56, in download_chunk
    with counter.get_lock():
AttributeError: 'NoneType' object has no attribute 'get_lock'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Python34\Scripts\himawaripy-script.py", line 9, in <module>
    load_entry_point('himawaripy==1.1', 'console_scripts', 'himawaripy')()
  File "C:\Python34\lib\site-packages\himawaripy-1.1-py3.4.egg\himawaripy\himawaripy.py", line 88, in main
  File "C:\Python34\lib\multiprocessing\pool.py", line 260, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "C:\Python34\lib\multiprocessing\pool.py", line 608, in get
    raise self._value
AttributeError: 'NoneType' object has no attribute 'get_lock'