BrokenPipeError

[XiaosongWen]

got broken pip error when all env.step() in test, any suggestion helps

Traceback (most recent call last):
  File "train.py", line 109, in <module>
    main()
  File "train.py", line 106, in main
    train(env, model, target_model, optimizer, replay_buffer, args, device)
  File "train.py", line 90, in train
    device, info, episode)
  File "train.py", line 81, in run_episode
    episode, epsilon, stats, args.action_space)
  File "train.py", line 46, in complete_episode
    test_new_model(model, environment, info, action_space)
  File "train.py", line 33, in test_new_model
    test(environment, action_space, info.new_best_counter)
  File "/home/xiaosongwen0313_gmail_com/RL_final/super-mario-bros-dqn/test.py", line 26, in test
    state, reward, done, info = env.step(action)
  File "/home/xiaosongwen0313_gmail_com/RL_final/super-mario-bros-dqn/core/wrappers.py", line 116, in step
    state, reward, done, info = self.env.step(action)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/core.py", line 261, in step
    observation, reward, done, info = self.env.step(action)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/core.py", line 261, in step
    observation, reward, done, info = self.env.step(action)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/core.py", line 261, in step
    observation, reward, done, info = self.env.step(action)
  [Previous line repeated 1 more time]
  File "/home/RL_final/super-mario-bros-dqn/core/wrappers.py", line 37, in step
    obs, reward, done, info = self.env.step(action)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/nes_py/wrappers/joypad_space.py", line 74, in step
    return self.env.step(self._action_map[action])
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitor.py", line 32, in step
    done = self._after_step(observation, reward, done, info)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitor.py", line 174, in _after_step
    self.video_recorder.capture_frame()
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitoring/video_recorder.py", line 116, in capture_frame
    self._encode_image_frame(frame)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitoring/video_recorder.py", line 166, in _encode_image_frame
    self.encoder.capture_frame(frame)
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitoring/video_recorder.py", line 303, in capture_frame
    self.proc.stdin.write(frame.tobytes())
**BrokenPipeError: [Errno 32] Broken pipe**
ERROR: VideoRecorder encoder exited with status 1
Exception ignored in: <function Monitor.__del__ at 0x7f9ee4e7a9e0>
Traceback (most recent call last):
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitor.py", line 229, in __del__
    self.close()
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/wrappers/monitor.py", line 134, in close
    super(Monitor, self).close()
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/core.py", line 236, in close
    return self.env.close()
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/gym/core.py", line 236, in close
    return self.env.close()
  File "/opt/conda/envs/RL/lib/python3.7/site-packages/nes_py/nes_env.py", line 338, in close
    raise ValueError('env has already been closed.')
**ValueError: env has already been closed.**