What’s the last known good version of PyTorch for which CUDA_VISIBLE_DEVICES=0 python demo.py --efficient True --data ./data on master converges, and how quickly does it converge? It is possible I have messed up but master doesn’t seem to converge for me on 0.2 (e02f7bf8a344b04f51527f233bd4727b6ebb1ebe) either.