Permission denied error due to race condition (?)

[sarimmehdi]

I get the following error when I run inference:

[2019-10-30 15:33:25,356 INFO test.py line 173 9944] Loaded configuration file config/ade20k-hrnetv2.yaml
[2019-10-30 15:33:25,356 INFO test.py line 174 9944] Running with config:
DATASET:
  imgMaxSize: 1000
  imgSizes: (300, 375, 450, 525, 600)
  list_train: ./data/training.odgt
  list_val: ./data/validation.odgt
  num_class: 150
  padding_constant: 32
  random_flip: True
  root_dataset: ./data/
  segm_downsampling_rate: 4
DIR: ckpt/ade20k-hrnetv2-c1
MODEL:
  arch_decoder: c1
  arch_encoder: hrnetv2
  fc_dim: 720
  weights_decoder: 
  weights_encoder: 
TEST:
  batch_size: 1
  checkpoint: epoch_30.pth
  result: ./
TRAIN:
  batch_size_per_gpu: 2
  beta1: 0.9
  deep_sup_scale: 0.4
  disp_iter: 20
  epoch_iters: 5000
  fix_bn: False
  lr_decoder: 0.02
  lr_encoder: 0.02
  lr_pow: 0.9
  num_epoch: 30
  optim: SGD
  seed: 304
  start_epoch: 0
  weight_decay: 0.0001
  workers: 16
VAL:
  batch_size: 1
  checkpoint: epoch_30.pth
  visualize: False
Loading weights for net_encoder
Loading weights for net_decoder
# samples: 1
  0%|          | 0/1 [00:00<?, ?it/s]Traceback (most recent call last):
  File "C:/Users/sarim/PycharmProjects/thesis/semantic_segmentation/test.py", line 201, in <module>
    main(cfg, args.gpu)
  File "C:/Users/sarim/PycharmProjects/thesis/semantic_segmentation/test.py", line 128, in main
    test(segmentation_module, loader_test, gpu)
  File "C:/Users/sarim/PycharmProjects/thesis/semantic_segmentation/test.py", line 59, in test
    for batch_data in loader:
  File "C:\Users\sarim\AppData\Local\Programs\Python\Python37\lib\site-packages\torch\utils\data\dataloader.py", line 582, in __next__
    return self._process_next_batch(batch)
  File "C:\Users\sarim\AppData\Local\Programs\Python\Python37\lib\site-packages\torch\utils\data\dataloader.py", line 608, in _process_next_batch
    raise batch.exc_type(batch.exc_msg)
PermissionError: Traceback (most recent call last):
  File "C:\Users\sarim\AppData\Local\Programs\Python\Python37\lib\site-packages\torch\utils\data\_utils\worker.py", line 99, in _worker_loop
    samples = collate_fn([dataset[i] for i in batch_indices])
  File "C:\Users\sarim\AppData\Local\Programs\Python\Python37\lib\site-packages\torch\utils\data\_utils\worker.py", line 99, in <listcomp>
    samples = collate_fn([dataset[i] for i in batch_indices])
  File "C:\Users\sarim\PycharmProjects\thesis\semantic_segmentation\dataset.py", line 266, in __getitem__
    img = Image.open(image_path).convert('RGB')
  File "C:\Users\sarim\AppData\Local\Programs\Python\Python37\lib\site-packages\PIL\Image.py", line 2770, in open
    fp = builtins.open(filename, "rb")
PermissionError: [Errno 13] Permission denied: 'D:/kitti/training/image_02/0000'

I set num_workers to 0 and 1 in the dataloader :

# Dataset and Loader
    dataset_test = TestDataset(
        cfg.list_test,
        cfg.DATASET)
    loader_test = torch.utils.data.DataLoader(
        dataset_test,
        batch_size=cfg.TEST.batch_size,
        shuffle=False,
        collate_fn=user_scattered_collate,
        num_workers=1,
        drop_last=True)

But I still get the same error.