error test: AssertionError

[SongRb]

>>> Number of zip files: 15
Traceback (most recent call last):
  File "train_generator.py", line 39, in <module>
    data_generator = processor.load_go_data(num_samples=args.sample_size)
  File "$HOME/betago/betago/dataloader/base_processor.py", line 135, in load_go_data
    self.map_to_workers(name, samples)
  File "$HOME/betago/betago/dataloader/base_processor.py", line 222, in map_to_workers
    results = p.get(0xFFFF)
  File "/usr/lib64/python2.7/multiprocessing/pool.py", line 554, in get
    raise self._value
AssertionError