Error in filenames file while training

[abdelrahmanmasoud]

File "bts_main.py", line 607, in
main()
File "bts_main.py", line 603, in main
main_worker(args.gpu, ngpus_per_node, args)
File "bts_main.py", line 404, in main_worker
dataloader_eval = BtsDataLoader(args, 'online_eval')
File "/home/BSc2022/abdelrahmanmasoud/bts/pytorch/bts_dataloader.py", line 62, in init
self.testing_samples = DataLoadPreprocess(args, mode, transform=preprocessing_transforms(mode))
File "/home/BSc2022/abdelrahmanmasoud/bts/pytorch/bts_dataloader.py", line 87, in init
with open(args.filenames_file_eval, 'r') as f:
TypeError: expected str, bytes or os.PathLike object, not NoneType

I get this error while training.However,filename isn't empty and if I write print statement in bts_dataloader before line 87 ,it will print me whatever is in the file.