FileNotFoundError: [Errno 2] No such file or directory: '/mnt/SSD/det/coco/annotations/instances_train2017.json'

[AL-Yan]

Traceback (most recent call last):
File "tools/train.py", line 108, in
main()
File "tools/train.py", line 85, in main
train_dataset = build_dataset(cfg.data.train)
File "/root/autodl-tmp/DB_loss/DistributionBalancedLoss/mllt/datasets/builder.py", line 36, in build_dataset
dataset = build_from_cfg(cfg, DATASETS)
File "/root/autodl-tmp/DB_loss/DistributionBalancedLoss/mllt/utils/registry.py", line 74, in build_from_cfg
return obj_type(**args)
File "/root/autodl-tmp/DB_loss/DistributionBalancedLoss/mllt/datasets/coco.py", line 27, in init
super(CocoDataset, self).init(**kwargs)
File "/root/autodl-tmp/DB_loss/DistributionBalancedLoss/mllt/datasets/custom.py", line 59, in init
self.img_infos = self.load_annotations(ann_file, LT_ann_file)
File "/root/autodl-tmp/DB_loss/DistributionBalancedLoss/mllt/datasets/coco.py", line 32, in load_annotations
self.coco = COCO(ann_file)
File "/root/miniconda3/envs/blast/lib/python3.7/site-packages/pycocotools-2.0-py3.7-linux-x86_64.egg/pycocotools/coco.py", line 84, in init
dataset = json.load(open(annotation_file, 'r'))
FileNotFoundError: [Errno 2] No such file or directory: '/mnt/SSD/det/coco/annotations/instances_train2017.json'

When I run python tools/train.py configs/coco/LT_resnet50_pfc_DB.py ,this error was rasied. I think this is because the program did not find the location of coco dataset. But I'm not sure. Can you tell me how to solve this error? Thank you!