copy_task.py stopped with NotFoundError

[softgearko]

When I run 'python3 copy_task.py', I got errors after batches 5000 as logs below.
Should I make ./save/copy_task/NTM directory?

batches 4900, loss 0.00113704
[[ 1. 1. 1. 1. 1. 1. 1. 0.]
[ 0. 0. 1. 1. 1. 0. 0. 0.]
[ 0. 1. 1. 0. 0. 1. 1. 0.]
[ 1. 0. 1. 1. 1. 0. 1. 1.]
[ 1. 0. 1. 0. 1. 0. 0. 0.]
[ 0. 1. 1. 0. 1. 0. 0. 1.]]
[[ 9.99992490e-01 9.99413490e-01 9.99982953e-01 9.99965310e-01
9.99992251e-01 9.97943461e-01 9.98543024e-01 1.08241523e-03]
[ 2.57530161e-07 2.93660793e-04 9.99461949e-01 9.99995112e-01
9.99989748e-01 1.24331400e-05 8.15727219e-07 3.13950721e-07]
[ 4.58355225e-06 9.99971747e-01 9.99837399e-01 4.42370627e-04
7.24922749e-04 9.99874592e-01 9.99990821e-01 8.03661169e-06]
[ 9.99992490e-01 3.12785669e-05 9.99974847e-01 9.99755561e-01
9.99990463e-01 2.00146256e-04 9.99897242e-01 9.99996305e-01]
[ 9.99901414e-01 1.38089956e-06 9.99881983e-01 2.78331245e-05
9.99562562e-01 2.01372593e-03 7.52124761e-05 1.45035756e-06]
[ 4.35841102e-05 9.99971151e-01 9.99959111e-01 2.36362739e-05
9.99997735e-01 2.10983402e-04 1.00746372e-04 9.99401808e-01]]
batches 5000, loss 0.00103774
2018-01-18 19:36:31.519871: W tensorflow/core/framework/op_kernel.cc:1192] Not found: ./save/copy_task/NTM; No such file or directory
Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 1323, in _do_call
return fn(*args)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 1302, in _run_fn
status, run_metadata)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/framework/errors_impl.py", line 473, in exit
c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors_impl.NotFoundError: ./save/copy_task/NTM; No such file or directory
[[Node: save/SaveV2 = SaveV2[dtypes=[DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/SaveV2/tensor_names, save/SaveV2/shape_and_slices, controller/basic_rnn_cell/bias/_7507, controller/basic_rnn_cell/kernel/_7509, init/init_M/_7511, init/init_r_0/_7513, init/init_state/_7515, o2o/o2o_b/_7517, o2o/o2o_w/_7519, o2p/o2p_b/_7521, o2p/o2p_w/_7523, optimizer/controller/basic_rnn_cell/bias/RMSProp/_7525, optimizer/controller/basic_rnn_cell/bias/RMSProp_1/_7527, optimizer/controller/basic_rnn_cell/kernel/RMSProp/_7529, optimizer/controller/basic_rnn_cell/kernel/RMSProp_1/_7531, optimizer/init/init_M/RMSProp/_7533, optimizer/init/init_M/RMSProp_1/_7535, optimizer/init/init_r_0/RMSProp/_7537, optimizer/init/init_r_0/RMSProp_1/_7539, optimizer/init/init_state/RMSProp/_7541, optimizer/init/init_state/RMSProp_1/_7543, optimizer/o2o/o2o_b/RMSProp/_7545, optimizer/o2o/o2o_b/RMSProp_1/_7547, optimizer/o2o/o2o_w/RMSProp/_7549, optimizer/o2o/o2o_w/RMSProp_1/_7551, optimizer/o2p/o2p_b/RMSProp/_7553, optimizer/o2p/o2p_b/RMSProp_1/_7555, optimizer/o2p/o2p_w/RMSProp/_7557, optimizer/o2p/o2p_w/RMSProp_1/_7559)]]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 1573, in save
{self.saver_def.filename_tensor_name: checkpoint_file})
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 889, in run
run_metadata_ptr)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 1120, in _run
feed_dict_tensor, options, run_metadata)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 1317, in _do_run
options, run_metadata)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/client/session.py", line 1336, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.NotFoundError: ./save/copy_task/NTM; No such file or directory
[[Node: save/SaveV2 = SaveV2[dtypes=[DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/SaveV2/tensor_names, save/SaveV2/shape_and_slices, controller/basic_rnn_cell/bias/_7507, controller/basic_rnn_cell/kernel/_7509, init/init_M/_7511, init/init_r_0/_7513, init/init_state/_7515, o2o/o2o_b/_7517, o2o/o2o_w/_7519, o2p/o2p_b/_7521, o2p/o2p_w/_7523, optimizer/controller/basic_rnn_cell/bias/RMSProp/_7525, optimizer/controller/basic_rnn_cell/bias/RMSProp_1/_7527, optimizer/controller/basic_rnn_cell/kernel/RMSProp/_7529, optimizer/controller/basic_rnn_cell/kernel/RMSProp_1/_7531, optimizer/init/init_M/RMSProp/_7533, optimizer/init/init_M/RMSProp_1/_7535, optimizer/init/init_r_0/RMSProp/_7537, optimizer/init/init_r_0/RMSProp_1/_7539, optimizer/init/init_state/RMSProp/_7541, optimizer/init/init_state/RMSProp_1/_7543, optimizer/o2o/o2o_b/RMSProp/_7545, optimizer/o2o/o2o_b/RMSProp_1/_7547, optimizer/o2o/o2o_w/RMSProp/_7549, optimizer/o2o/o2o_w/RMSProp_1/_7551, optimizer/o2p/o2p_b/RMSProp/_7553, optimizer/o2p/o2p_b/RMSProp_1/_7555, optimizer/o2p/o2p_w/RMSProp/_7557, optimizer/o2p/o2p_w/RMSProp_1/_7559)]]

Caused by op 'save/SaveV2', defined at:
File "copy_task.py", line 101, in
main()
File "copy_task.py", line 29, in main
train(args)
File "copy_task.py", line 45, in train
saver = tf.train.Saver(tf.global_variables())
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 1218, in init
self.build()
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 1227, in build
self._build(self._filename, build_save=True, build_restore=True)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 1263, in _build
build_save=build_save, build_restore=build_restore)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 748, in _build_internal
save_tensor = self._AddSaveOps(filename_tensor, saveables)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 296, in _AddSaveOps
save = self.save_op(filename_tensor, saveables)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 239, in save_op
tensors)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/ops/gen_io_ops.py", line 1163, in save_v2
shape_and_slices=shape_and_slices, tensors=tensors, name=name)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/framework/op_def_library.py", line 787, in _apply_op_helper
op_def=op_def)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/framework/ops.py", line 2956, in create_op
op_def=op_def)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/framework/ops.py", line 1470, in init
self._traceback = self._graph._extract_stack() # pylint: disable=protected-access

NotFoundError (see above for traceback): ./save/copy_task/NTM; No such file or directory
[[Node: save/SaveV2 = SaveV2[dtypes=[DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/SaveV2/tensor_names, save/SaveV2/shape_and_slices, controller/basic_rnn_cell/bias/_7507, controller/basic_rnn_cell/kernel/_7509, init/init_M/_7511, init/init_r_0/_7513, init/init_state/_7515, o2o/o2o_b/_7517, o2o/o2o_w/_7519, o2p/o2p_b/_7521, o2p/o2p_w/_7523, optimizer/controller/basic_rnn_cell/bias/RMSProp/_7525, optimizer/controller/basic_rnn_cell/bias/RMSProp_1/_7527, optimizer/controller/basic_rnn_cell/kernel/RMSProp/_7529, optimizer/controller/basic_rnn_cell/kernel/RMSProp_1/_7531, optimizer/init/init_M/RMSProp/_7533, optimizer/init/init_M/RMSProp_1/_7535, optimizer/init/init_r_0/RMSProp/_7537, optimizer/init/init_r_0/RMSProp_1/_7539, optimizer/init/init_state/RMSProp/_7541, optimizer/init/init_state/RMSProp_1/_7543, optimizer/o2o/o2o_b/RMSProp/_7545, optimizer/o2o/o2o_b/RMSProp_1/_7547, optimizer/o2o/o2o_w/RMSProp/_7549, optimizer/o2o/o2o_w/RMSProp_1/_7551, optimizer/o2p/o2p_b/RMSProp/_7553, optimizer/o2p/o2p_b/RMSProp_1/_7555, optimizer/o2p/o2p_w/RMSProp/_7557, optimizer/o2p/o2p_w/RMSProp_1/_7559)]]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "copy_task.py", line 101, in
main()
File "copy_task.py", line 29, in main
train(args)
File "copy_task.py", line 77, in train
saver.save(sess, args.save_dir + '/' + args.model + '/model.tfmodel', global_step=b)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/training/saver.py", line 1594, in save
raise exc
ValueError: Parent directory of ./save/copy_task/NTM/model.tfmodel doesn't exist, can't save.
softgear@lobe6:~/work/snowkylin_ntm_mann/ntm$

[snowkylin]

Please create directory ./save/copy_task/NTM so that checkpoint files have place to be saved. Sorry that I do not mention it in the readme file.

[softgearko]

Yes. It works after I made that directory.
Thank you.

[azzedineA]

I have a question what is copy task ,I mean what Ntm try to learn in this task ?