RUN ERROR

[N-Kingsley]

When I run 'python ptb_word_lm.py --data_path=ptb_data/',error is as follows.How can I solve the problem?
('batch_size', 20)
('dim_F', 20)
('dim_Obs', 20)
('dim_P', 20)
('hidden_size', 20)
('init_scale', 0.0)
('keep_prob', 1.0)
('kernel_width_F', 0.2)
('kernel_width_Obs', 2)
('kernel_width_P', 0.2)
('learning_rate', 1)
('lr_decay', 1.0)
('max_epoch', 10)
('max_grad_norm', 0.25)
('nRFF_F', 2000)
('nRFF_Obs', 2000)
('nRFF_P', 2000)
('num_layers', 1)
('num_steps', 20)
('obs_window', 5)
('reg_rate', 0.001)
('seed', 0)
('vocab_size', 49)
featurizing
project into rff space
Traceback (most recent call last):
File "ptb_word_lm.py", line 352, in
tf.app.run()
File "/home/ni/.conda/envs/py3/lib/python3.6/site-packages/tensorflow/python/platform/app.py", line 126, in run
_sys.exit(main(argv))
File "ptb_word_lm.py", line 288, in main
config.obs_window)
File "/home/ni/psrnn/two_stage_regression.py", line 119, in two_stage_regression
Obs_rff = Obs_Proj.project(Obs_rff)
File "/home/ni/psrnn/two_stage_regression.py", line 28, in project
return np.cos((x.T.dot(self.W) + self.b).T)*np.sqrt(2.)/np.sqrt(self.nRFF)
MemoryError