Working on multi processing.
Getting error

Process SpawnPoolWorker-3:
Traceback (most recent call last):
  File "C:\Python34\lib\multiprocessing\process.py", line 254, in _bootstrap
    self.run()
  File "C:\Python34\lib\multiprocessing\process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Python34\lib\multiprocessing\pool.py", line 108, in worker
    task = get()
  File "C:\Python34\lib\multiprocessing\queues.py", line 357, in get
    return ForkingPickler.loads(res)
AttributeError: 'ChanThread' object has no attribute '__getImage'
Process SpawnPoolWorker-4:
Traceback (most recent call last):
  File "C:\Python34\lib\multiprocessing\process.py", line 254, in _bootstrap
    self.run()
  File "C:\Python34\lib\multiprocessing\process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Python34\lib\multiprocessing\pool.py", line 108, in worker
    task = get()
  File "C:\Python34\lib\multiprocessing\queues.py", line 357, in get
    return ForkingPickler.loads(res)
AttributeError: 'ChanThread' object has no attribute '__getImage'