rank parameter missing

[tuyunbin]

Hi, I have met a problem. I have a single server which has 8 gpus. I used ubuntu16.04 and pytorch1.4 and my cuda is 10.0.
The problem is that I met an error when I used following command:
CUDA_VISIBLE_DEVICES=0 python3 scripts/train.py --dist_url 'file:///data/luwantong/nonexistent_file' --cfgs_file cfgs/yc2.yml
--checkpoint_path ./checkpoint/$id --batch_size 14 --world_size 4
--cuda --sent_weight 0.25 | tee log/$id-0 &
CUDA_VISIBLE_DEVICES=1 python3 scripts/train.py --dist_url 'file:///data/luwantong/nonexistent_file' --cfgs_file cfgs/yc2.yml
--checkpoint_path ./checkpoint/$id --batch_size 14 --world_size 4
--cuda --sent_weight 0.25 | tee log/$id-1 &
CUDA_VISIBLE_DEVICES=2 python3 scripts/train.py --dist_url 'file:///data/luwantong/nonexistent_file' --cfgs_file cfgs/yc2.yml
--checkpoint_path ./checkpoint/$id --batch_size 14 --world_size 4
--cuda --sent_weight 0.25 | tee log/$id-2 &
CUDA_VISIBLE_DEVICES=3 python3 scripts/train.py --dist_url 'file:///data/luwantong/nonexistent_file' --cfgs_file cfgs/yc2.yml
--checkpoint_path ./checkpoint/$id --batch_size 14 --world_size 4
--cuda --sent_weight 0.25 | tee log/$id-3
ValueError: Error initializing torch.distributed using file:// rendezvous: rank parameter missing

[LuoweiZhou]

The code is only compatible with an old version of PyTorch (0.4.0) which uses a different/old distributed data parallel package.