Hi @herveyrobot and @nbqu ,

[herveyrobot]

          Hi @herveyrobot and @nbqu ,

The example.py code was written with the assumption that it would be run on a mac, sorry about that! As the error message notes:

[d != torch.device("cpu") and d >= 0 for d in devices]
TypeError: 'NoneType' object is not iterable
[engine.py: 1861]

the parameter devices passed to the TwoPhaseRGBBaseExperimentConfig.stagewise_task_sampler_args function is None by default which is fine when you're not using Linux but causes issues otherwise. Can you try changing:

task_sampler_params = TwoPhaseRGBBaseExperimentConfig.stagewise_task_sampler_args(
    stage="train", process_ind=0, total_processes=1,
)

to

task_sampler_params = TwoPhaseRGBBaseExperimentConfig.stagewise_task_sampler_args(
    stage="train", process_ind=0, total_processes=1, devices=[0]
)

and trying again?

Originally posted by @Lucaweihs in #48 (comment)

[herveyrobot]

It can't work for me. The errors that occurred are as follows：

[08/08 19:43:13 ERROR:] [train worker 0] Encountered TypeError, exiting. [engine.py: 1858]
[08/08 19:43:13 ERROR:] Traceback (most recent call last):
File "/root/ai2thor-rearrangement/baseline_configs/rearrange_base.py", line 292, in stagewise_task_sampler_args
x_displays = get_open_x_displays(throw_error_if_empty=True)
File "/opt/miniconda3/envs/rearrange/lib/python3.9/site-packages/allenact_plugins/ithor_plugin/ithor_util.py", line 88, in get_open_x_displays
raise IOError(
OSError: Could not find any open X-displays on which to run AI2-THOR processes. Please see the AI2-THOR installation instructions at https://allenact.org/installation/installation-framework/#installation-of-ithor-ithor-plugin for information as to how to start such displays.

During handling of the above exception, another exception occurred:
TypeError: 'NoneType' object is not iterable
[engine.py: 1861]
[08/08 19:43:13 ERROR:] Encountered Exception. Terminating runner. [runner.py: 1467]
[08/08 19:43:13 ERROR:] Traceback (most recent call last):
File "/opt/miniconda3/envs/rearrange/lib/python3.9/site-packages/allenact/algorithms/onpolicy_sync/runner.py", line 1434, in log_and_close
raise Exception(
Exception: Train worker 0 abnormally terminated
[runner.py: 1468]
Traceback (most recent call last):
File "/opt/miniconda3/envs/rearrange/lib/python3.9/site-packages/allenact/algorithms/onpolicy_sync/runner.py", line 1434, in log_and_close
raise Exception(
Exception: Train worker 0 abnormally terminated

[Stardust-y]

same problem when training, have you solved it yet?