FileNotFoundError: [Errno 2] No such file or directory: '../../demo/annotations/demo_val.json'

[woo1]

When I run this code for human instance segmentation, this error raises.
(https://github.com/PeikeLi/Self-Correction-Human-Parsing/blob/master/mhp_extension/demo.ipynb)
"
!python finetune_net.py
--num-gpus 1
--config-file ../configs/Misc/demo.yaml
--eval-only MODEL.WEIGHTS ../../pretrain_model/detectron2_maskrcnn_cihp_finetune.pth TEST.AUG.ENABLED False DATALOADER.NUM_WORKERS 0
"

Traceback (most recent call last):
File "finetune_net.py", line 182, in
args=(args,),
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/engine/launch.py", line 82, in launch
main_func(*args)
File "finetune_net.py", line 152, in main
res = Trainer.test(cfg, model)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/engine/defaults.py", line 602, in test
data_loader = cls.build_test_loader(cfg, dataset_name)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/engine/defaults.py", line 558, in build_test_loader
return build_detection_test_loader(cfg, dataset_name)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/config/config.py", line 207, in wrapped
explicit_args = _get_args_from_config(from_config, *args, **kwargs)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/config/config.py", line 245, in _get_args_from_config
ret = from_config_func(*args, **kwargs)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/build.py", line 456, in _test_loader_from_config
else None,
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/build.py", line 241, in get_detection_dataset_dicts
dataset_dicts = [DatasetCatalog.get(dataset_name) for dataset_name in names]
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/build.py", line 241, in
dataset_dicts = [DatasetCatalog.get(dataset_name) for dataset_name in names]
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/catalog.py", line 58, in get
return f()
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/datasets/coco.py", line 500, in
DatasetCatalog.register(name, lambda: load_coco_json(json_file, image_root, name))
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/detectron2/data/datasets/coco.py", line 69, in load_coco_json
coco_api = COCO(json_file)
File "/Self-Correction-Human-Parsing/venv/lib/python3.7/site-packages/pycocotools/coco.py", line 81, in init
with open(annotation_file, 'r') as f:

Should I prepare some other files?