ValueError: need at least one array to concatenate

[ianphoi]

File "C:\Users\ianph\dgcnn\pytorch\main.py", line 225, in
train(args, io)
File "C:\Users\ianph\dgcnn\pytorch\main.py", line 40, in train
train_loader = DataLoader(ModelNet40(partition='train', num_points=args.num_points), num_workers=8,
File "C:\Users\ianph\dgcnn\pytorch\data.py", line 66, in init
self.data, self.label = load_data(partition)
File "C:\Users\ianph\dgcnn\pytorch\data.py", line 45, in load_data
all_data = np.concatenate(all_data, axis=0)
File "<array_function internals>", line 180, in concatenate

[xuanyuulin]

?

[KorolLich]

If your data/ folder is empty, so it can be caused by expired certificates of https://shapenet.cs.stanford.edu. To fix it, you need to add "--no-check-certificate" argument for wget utility: https://github.com/WangYueFt/dgcnn/blob/master/pytorch/data.py#L27C2-L27C56