Tensors of type TensorImpl do not have sizes

[Xxxkkkkx]

During the training process, I keep encountering the following error. I have checked the format of xyz1 and xyz2 inputs to ChamferFunction, which are (32, 640, 3) and (32, 1280, 3) respectively, and they seem to be correct. I would like to consult on possible solutions. Looking forward to your response.

[CuiRuikai]

I did not encounter such a problem.
After some research on this issues, I have two things to confirm: 1) are you using sparse tensor? 2) can you try making all tensor continuous (.continuous() in PyTorch) before sending to the chamfer function.

[CuiRuikai]

PyTorch3D also provides an implementation of Chamfer distance, which might be more robust than the one that I used. You could try this version.
https://pytorch3d.readthedocs.io/en/latest/modules/loss.html

Please let me know if the above solutions are not able to resolve this issues