ValueError: num_samples should be a positive integeral value, but got num_samples=0 about fcos

[tianzhi0549]

@qianzhang2018 It seems that the dataloader didn't get any images. Please check your code.

[qianzhang2018]

where is the “--images-dir” in train？ it is in fcos_R_50_FPN_1x.yaml---DATASETS:？

[qianzhang2018]

FCOS
-----datasets
-----coco
----- annotations
----- coco_2014_train
----- coco_2014_valminusminival
i put my own traindata in coco_2014_train and val data in coco_2014_valminusminival
is it right？

[Mahmood-Hussain]

FCOS
-----datasets
-----coco
----- annotations
----- coco_2014_train
----- coco_2014_valminusminival
i put my own traindata in coco_2014_train and val data in coco_2014_valminusminival
is it right？

I am facing the same issue. Would you tell me please where I am wrong?

loading annotations into memory...
Done (t=0.02s)
creating index...
index created!
loading annotations into memory...
Done (t=0.00s)
creating index...
index created!
Traceback (most recent call last):
File "tools/train_net.py", line 181, in
main()
File "tools/train_net.py", line 174, in main
model = train(cfg, args.local_rank, args.distributed)
File "tools/train_net.py", line 67, in train
start_iter=arguments["iteration"],
File "/home/mahmood/FCOS/fcos_core/data/build.py", line 159, in make_data_loader
sampler = make_data_sampler(dataset, shuffle, is_distributed)
File "/home/mahmood/FCOS/fcos_core/data/build.py", line 63, in make_data_sampler
sampler = torch.utils.data.sampler.RandomSampler(dataset)
File "/home/mahmood/anaconda3/envs/FCOS/lib/python3.7/site-packages/torch/utils/data/sampler.py", line 94, in init
"value, but got num_samples={}".format(self.num_samples))
ValueError: num_samples should be a positive integer value, but got num_samples=0
Traceback (most recent call last):
File "/home/mahmood/anaconda3/envs/FCOS/lib/python3.7/runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "/home/mahmood/anaconda3/envs/FCOS/lib/python3.7/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/mahmood/anaconda3/envs/FCOS/lib/python3.7/site-packages/torch/distributed/launch.py", line 253, in
main()
File "/home/mahmood/anaconda3/envs/FCOS/lib/python3.7/site-packages/torch/distributed/launch.py", line 249, in main
cmd=cmd)
subprocess.CalledProcessError: Command '['/home/mahmood/anaconda3/envs/FCOS/bin/python', '-u', 'tools/train_net.py', '--local_rank=0', '--config-file',