$ PYTHON_PATH cartpole_example.py 
[Warning] [omni.isaac.kit.simulation_app] Modules: ['omni.isaac.gym', 'omni.isaac.gym.vec_env', 'omni.isaac.gym.vec_env.vec_env_base', 'omni.isaac.gym.vec_env.vec_env_mt'] were loaded before SimulationApp was started and might not be loaded correctly.
[Warning] [omni.isaac.kit.simulation_app] Please check to make sure no extra omniverse or pxr modules are imported before the call to SimulationApp(...)
Starting kit application with the fillowing args:  ['/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/exts/omni.isaac.kit/omni/isaac/kit/simulation_app.py', '/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/apps/omni.isaac.sim.python.kit', '--/app/tokens/exe-path=/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit', '--/persistent/app/viewport/displayOptions=3094', '--/rtx/materialDb/syncLoads=True', '--/rtx/hydra/materialSyncLoads=True--/omni.kit.plugin/syncUsdLoads=True', '--/app/renderer/resolution/width=1280', '--/app/renderer/resolution/height=720', '--/app/window/width=1440', '--/app/window/height=900', '--/renderer/multiGpu/enabled=True', '--ext-folder', '/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/exts', '--ext-folder', '/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/apps', '--portable', '--no-window']
Passing the following args to the base kit application:  []
[Warning] [omni.kit.app.plugin] No crash reporter present, dumps uploading isn't available.
[Info] [carb] Logging to file: /home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/logs/Kit/Isaac-Sim/2022.1/kit_20220616_151924.log
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2022-06-16 06:19:25 [193ms] [Warning] [carb] FrameworkImpl::setDefaultPlugin(client: omni.gpu_foundation_factory.plugin, desc : [carb::graphics::Graphics v2.5], plugin : carb.graphics-vulkan.plugin) failed. Plugin selection is locked, because the interface was previously acquired by: 
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[0.223s] [ext: omni.kit.renderer.init-0.0.0] startup

|---------------------------------------------------------------------------------------------|
| Driver Version: 470.129.6     | Graphics API: Vulkan
|=============================================================================================|
| GPU | Name                             | Active | LDA | GPU Memory | Vendor-ID | LUID       |
|     |                                  |        |     |            | Device-ID | UUID       |
|---------------------------------------------------------------------------------------------|
| 0   | NVIDIA RTX A6000                 | Yes: 0 |     | 49386   MB | 10de      | 0          |
|     |                                  |        |     |            | 2230      | 3a2e70c4.. |
|=============================================================================================|
| OS: Linux jong-Precision-5820-Tower, Version: 5.10.0-1023-oem
| Processor: Intel(R) Xeon(R) W-2295 CPU @ 3.00GHz | Cores: Unknown | Logical: 36
|---------------------------------------------------------------------------------------------|
| Total Memory (MB): 128511 | Free Memory: 117262
| Total Page/Swap (MB): 2047 | Free Page/Swap: 2047
|---------------------------------------------------------------------------------------------|
2022-06-16 06:19:26 [1,127ms] [Warning] [carb.cudainterop.plugin] On Linux only, CUDA and the display driver does not support IOMMU-enabled bare-metal PCIe peer to peer memory copy.
However, CUDA and the display driver does support IOMMU via VM pass through. As a consequence, users on Linux,
when running on a native bare metal system, should disable the IOMMU. The IOMMU should be enabled and the VFIO driver
be used as a PCIe pass through for virtual machines.
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2022-06-16 06:19:27 [2,639ms] [Error] [rtx.neuraylib.plugin] [DYNLIB:IO]   0.1   DYNLIB io   error: /home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/bin/libs/iray/libnvindex.so: cannot open shared object file: No such file or directory
2022-06-16 06:19:27 [2,639ms] [Error] [rtx.neuraylib.plugin] [INDEX:MAIN]   0.1   INDEX  main error: Failed to load /home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/bin/libs/iray/libnvindex.so
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2022-06-16 06:19:29 [4,170ms] [Warning] [omni.kvdb.plugin] wasn't able to load the meta database, trying to repair it ...
2022-06-16 06:19:29 [4,172ms] [Warning] [omni.kvdb.plugin] repair failed
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Warp initialized:
   Version: 0.2.1
   Using CUDA device: NVIDIA RTX A6000
   Using CPU compiler: Not found
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2022-06-16 06:19:31 [6,958ms] [Warning] [omni.physx.plugin] Deprecated: getSimulationEventStream is deprecated, please use getSimulationEventStreamV2
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2022-06-16 06:19:32 [7,988ms] [Warning] [omni.physx.plugin] Deprecated: getSimulationEventStream is deprecated, please use getSimulationEventStreamV2
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[8.321s] Simulation App Starting
[9.524s] app ready
[13.651s] Simulation App Startup Complete
/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/exts/omni.isaac.ml_archive/pip_prebundle/gym/spaces/box.py:74: UserWarning: WARN: Box bound precision lowered by casting to float32
  "Box bound precision lowered by casting to {}".format(self.dtype)
2022-06-16 06:19:38 [14,011ms] [Warning] [carb.flatcache.plugin] Type tag does not have a corresponding USD type
Using cuda:0 device
Wrapping the env with a `Monitor` wrapper
Wrapping the env in a DummyVecEnv.
Traceback (most recent call last):
  File "cartpole_example.py", line 26, in <module>
    model.learn(total_timesteps=100000)
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/lib/python3.7/site-packages/stable_baselines3/ppo/ppo.py", line 313, in learn
    reset_num_timesteps=reset_num_timesteps,
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/lib/python3.7/site-packages/stable_baselines3/common/on_policy_algorithm.py", line 243, in learn
    total_timesteps, eval_env, callback, eval_freq, n_eval_episodes, eval_log_path, reset_num_timesteps, tb_log_name
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/lib/python3.7/site-packages/stable_baselines3/common/base_class.py", line 429, in _setup_learn
    self._last_obs = self.env.reset()  # pytype: disable=annotation-type-mismatch
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/lib/python3.7/site-packages/stable_baselines3/common/vec_env/dummy_vec_env.py", line 61, in reset
    obs = self.envs[env_idx].reset()
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/kit/python/lib/python3.7/site-packages/stable_baselines3/common/monitor.py", line 79, in reset
    return self.env.reset(**kwargs)
  File "/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/exts/omni.isaac.gym/omni/isaac/gym/vec_env/vec_env_base.py", line 130, in reset
    self._task.reset()
AttributeError: 'CartpoleTask' object has no attribute 'reset'
/home/jong/.local/share/ov/pkg/isaac_sim-2022.1.0/python.sh: line 46: 247039 Segmentation fault      (core dumped) $python_exe "$@" $args
There was an error running python