When I am trying to fit a model I am getting error : Expected object of type torch.cuda.LongTensor but found type torch.cuda.IntTensor

[ritika26 (ritika)]

When I am trying to fit a model I am getting below error
RuntimeError: Expected object of type torch.cuda.LongTensor but found type torch.cuda.IntTensor for argument #2 ‘target’

Anyone please suggest how to fix this issue.

I am using fastai Version: 1.0.36.post1 and windows 10

Thanks,
Ritika

[Theivaprakasham (Theivaprakasham Hari)]

I have the same issue here when using Google Colab on lesson3-camvid.ipynb of Fastai Course v3. I am using fastai v1.0.40.

[AndrewThompsonW3QA (Andrew Peter Thompson)]

torch.cuda.LongTensor but found type torch.cuda.IntTensor

This issue was reported as fixed here- I don’t use Windows so can’t confirm:

Pytorch variable mismatch(cuda.LongTensor vs cuda.IntTensor) in running lesson1.ipynb

Yup it’s a known problem on Windows, where fastai isn’t supported as yet. Do a forum search and you’ll find a few solutions to this issue. FYI if you’re fairly new to DL I’d strongly suggest using Linux instead of Windows, since neither pytorch nor fastai is supported on Windows as yet. (Will be from pytorch 0.4 however)