classification Evaluation code error AttributeError: 'NoneType' object has no attribute 'initialize' How can I solve it?

[youngdaragon]

Hi, i used evaluation classification code , but I get an error.
Traceback (most recent call last):
File "main.py", line 357, in
main(config)
File "main.py", line 89, in main
model, optimizer = amp.initialize(model, optimizer, opt_level=config.AMP_OPT_LEVEL)
AttributeError: 'NoneType' object has no attribute 'initialize'
ERROR:torch.distributed.elastic.multiprocessing.api:failed (exitcode: 1) local_rank: 0 (pid: 93793) of binary: /home/kimyongtae/Downloads/myAnaconda/envs/myenv/bin/python
Traceback (most recent call last):
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/launch.py", line 193, in
main()
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/launch.py", line 189, in main
launch(args)
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/launch.py", line 174, in launch
run(args)
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/run.py", line 710, in run
elastic_launch(
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/launcher/api.py", line 131, in call
return launch_agent(self._config, self._entrypoint, list(args))
File "/home/kimyongtae/Downloads/myAnaconda/envs/myenv/lib/python3.8/site-packages/torch/distributed/launcher/api.py", line 259, in launch_agent
raise ChildFailedError(
torch.distributed.elastic.multiprocessing.errors.ChildFailedError:

main.py FAILED

Failures:
<NO_OTHER_FAILURES>

Root Cause (first observed failure):
[0]:
time : 2022-03-04_13:30:27
host : kimyongtae-B250-HD3
rank : 0 (local_rank: 0)
exitcode : 1 (pid: 93793)
error_file: <N/A>
traceback : To enable traceback see: https://pytorch.org/docs/stable/elastic/errors.html

How can I solve it?

[gcunhase]

Did you resolve this?

[youngdaragon]

yes i solved it. it's problem is gpu lank. i use single gpu, but i was gpu lank settings multigpu. so i change gpu lank.

[gcunhase]

How did you solve it? Can you please add the exact command so other people can reproduce the fix? Thanks @youngdaragon