FileNotFoundError: [Errno 2] No such file or directory: 'data/coco/annotations/instances_val2017.json'

[Lixia1221]

python tools/test.py configs/grid_rcnn_r50_fpn_2x.py checkpoints/grid_rcnn_res50.pth --show
loading annotations into memory...
Traceback (most recent call last):
File "tools/test.py", line 189, in
main()
File "tools/test.py", line 145, in main
dataset = get_dataset(cfg.data.test)
File "/home/fsr/Grid-R-CNN/mmdet/datasets/utils.py", line 110, in get_dataset
dset = obj_from_dict(data_info, datasets)
File "/home/fsr/anaconda3/envs/open-mmlab/lib/python3.7/site-packages/mmcv/runner/utils.py", line 50, in obj_from_dict
return obj_type(**args)
File "/home/fsr/Grid-R-CNN/mmdet/datasets/custom.py", line 61, in init
self.img_infos = self.load_annotations(ann_file)
File "/home/fsr/Grid-R-CNN/mmdet/datasets/coco.py", line 25, in load_annotations
self.coco = COCO(ann_file)
File "/home/fsr/anaconda3/envs/open-mmlab/lib/python3.7/site-packages/pycocotools-2.0.2-py3.7-linux-x86_64.egg/pycocotools/coco.py", line 84, in init
with open(annotation_file, 'r') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'data/coco/annotations/instances_val2017.json'

but the file does exist.