RuntimeError: Function 'DotBackward0' returned nan values in its 0th output.

[Bingo-1996]

Hi~ Thank you for releasing the code. When I run the training code, the loss will appear Nan after several epochs. I have tried three times and encountered the same problem. I did not modify any parameters. Can you give me some advice?

[lolrudy]

Which version of code are you using? The main branch or the shape prior one?

[lolrudy]

I encountered this error before. There are two potential reasons:

1. The sampled point cloud has no point since the ground truth mask is errorneous.
2. The bounding box voting process includes computing the inverse matrix. A non-full rank matrix yields the error.
   You might need to check the loss value before backward the loss and mask out NaN.

[Bingo-1996]

Which version of code are you using? The main branch or the shape prior one?

I use the main branch

[Bingo-1996]

Thank you for your advice. I will try it

[HannahHaensen]

@Bingo-1996 can you post how you solved this?
or have you solved it?
:) thanks in advance

[HannahHaensen]

@lolrudy and @Bingo-1996
like that?

# backward
shape = total_loss.shape
total_loss = total_loss.reshape(shape[0], -1)
# Drop all rows containing any nan:
total_loss = total_loss[~torch.any(total_loss.isnan(), dim=1)]
# Reshape back:
 total_loss = total_loss.reshape(total_loss.shape[0], *shape[1:])

[Bingo-1996]

@HannahHaensen I haven't solved this problem, and there are other problems when I use the shape prior branch. Did you solve the problem?

[lolrudy]

Yes, this should work. Or you can set all nan values to 0.

[HannahHaensen]

@Bingo-1996 not sure yet this error occured for me after ~30 epochs not there again yet but if the training passes I can confirm or decline :) and i am on the main branch not the shape prior

@lolrudy thanks!