Error after python main.py --env-name "PongNoFrameskip-v4"

[FulChou]

hello, i get this error, when i run code "python main.py --env-name "PongNoFrameskip-v4" i don't know what happed, my env is: python3.6.3 Package Version

---

atari-py 0.2.6 cached-property 1.5.2 cloudpickle 1.6.0 cycler 0.10.0 dataclasses 0.8 future 0.18.2 gym 0.18.0 h5py 3.1.0 kiwisolver 1.3.1 matplotlib 3.3.4 numpy 1.19.5 pandas 1.1.5 Pillow 7.2.0 pip 21.0.1 pybullet 3.1.2 pyglet 1.5.0 pyparsing 2.4.7 python-dateutil 2.8.1 pytz 2021.1 scipy 1.5.4 setuptools 28.8.0 six 1.15.0 stable-baselines3 1.0 torch 1.8.1 typing-extensions 3.7.4.3

Thank you for your help!

error: Process ForkServerProcess-2: Process ForkServerProcess-6: Traceback (most recent call last): Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Process ForkServerProcess-5: Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Process ForkServerProcess-1: Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Process ForkServerProcess-3: Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Process ForkServerProcess-7: Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Process ForkServerProcess-4: Traceback (most recent call last): File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 38, in _worker observation = env.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 264, in reset observation = self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 277, in reset return self.env.reset(**kwargs) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/gym/core.py", line 265, in reset return self.observation(observation) File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/atari_wrappers.py", line 202, in observation frame = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY) AttributeError: 'NoneType' object has no attribute 'cvtColor' Traceback (most recent call last): File "main.py", line 198, in main() File "main.py", line 96, in main obs = envs.reset() File "/Users/vincent/Downloads/pytorch-a2c-ppo-acktr-gail-master/a2c_ppo_acktr/envs.py", line 250, in reset obs = self.venv.reset() File "/Users/vincent/Downloads/pytorch-a2c-ppo-acktr-gail-master/a2c_ppo_acktr/envs.py", line 175, in reset obs = self.venv.reset() File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 133, in reset obs = [remote.recv() for remote in self.remotes] File "/Users/vincent/.pyenv/versions/a2c_3.6.3/lib/python3.6/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 133, in obs = [remote.recv() for remote in self.remotes] File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/connection.py", line 250, in recv buf = self._recv_bytes() File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/connection.py", line 407, in _recv_bytes buf = self._recv(4) File "/Users/vincent/.pyenv/versions/3.6.3/lib/python3.6/multiprocessing/connection.py", line 383, in _recv raise EOFError EOFError

[NJJ-UA]

try: pip3 install opencv-python

[igbp]

Hi, @CSU-FulChou did you get a work around?

I'm running into the exact same issue:

Process ForkProcess-8: Traceback (most recent call last): File "/usr/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap self.run() File "/usr/lib/python3.6/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/home/giovani/baselines/baselines/common/vec_env/shmem_vec_env.py", line 123, in _subproc_worker cmd, data = pipe.recv() File "/usr/lib/python3.6/multiprocessing/connection.py", line 250, in recv buf = self._recv_bytes() File "/usr/lib/python3.6/multiprocessing/connection.py", line 407, in _recv_bytes buf = self._recv(4) File "/usr/lib/python3.6/multiprocessing/connection.py", line 383, in _recv raise EOFError EOFError

Repeats for 8 forkprocesses. Tried the opencv-python install and did not work.

[BigBearBlacken]

try: pip3 install opencv-python

nice!