Problem about Permission denied

[yangwenshuangshuang]

Command Line Args: Namespace(config_file='configs/d2/train-d2-r101.yaml', dist_url='tcp://127.0.0.1:50154', eval_only=False, machine_rank=0, mode='d2', num_gpus=1, num_machines=1, opts=[], resume=False)
Traceback (most recent call last):
File "/media/ntu/volume1/home/s122md306_02/yangwenshuang/attentionMILVLG/bottom-up-attention.pytorch/train_net.py", line 129, in
args=(args,),
File "/media/ntu/volume1/home/s122md306_02/yangwenshuang/attentionMILVLG/bottom-up-attention.pytorch/detectron2/detectron2/engine/launch.py", line 62, in launch
dist.init_process_group('gloo', init_method='file://tmp/somefile', rank=0, world_size=1)
File "/media/ntu/volume1/home/s122md306_02/yangwenshuang/anaconda/anaconda3/envs/attention/lib/python3.7/site-packages/torch/distributed/distributed_c10d.py", line 591, in init_process_group
timeout=timeout,
File "/media/ntu/volume1/home/s122md306_02/yangwenshuang/anaconda/anaconda3/envs/attention/lib/python3.7/site-packages/torch/distributed/distributed_c10d.py", line 684, in _new_process_group_helper
pg = ProcessGroupGloo(prefix_store, rank, world_size, timeout=timeout)
RuntimeError: open(/somefile): Permission denied

Process finished with exit code 134 (interrupted by signal 6: SIGABRT)

May I ask why it show Permission denied? Thx