OSError: [Errno 12] Cannot allocate memory

[yeguixin]

When I use my own dataset to train RCN, an exception occures, the error information as follow:

The command:
python2.7 science_rcn/run_onechar.py --train_size 31000 --test_size 3100 --parallel --pool_shape 25 --perturb_factor 2.0

ERROR INFO:
NFO:main:Training on 31000 images...
INFO:main:Testing on 3100 images...
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
self.run()
File "/usr/lib64/python2.7/threading.py", line 765, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/lib64/python2.7/multiprocessing/pool.py", line 325, in _handle_workers
pool._maintain_pool()
File "/usr/lib64/python2.7/multiprocessing/pool.py", line 229, in _maintain_pool
self._repopulate_pool()
File "/usr/lib64/python2.7/multiprocessing/pool.py", line 222, in _repopulate_pool
w.start()
File "/usr/lib64/python2.7/multiprocessing/process.py", line 130, in start
self._popen = Popen(self)
File "/usr/lib64/python2.7/multiprocessing/forking.py", line 121, in init
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory