No such operator torchvision::nms

[soldierofhell]

Hi,

I'm get an error when I try to use new torch.ops, e.g.

import torch
torch.ops.torchvision.nms

results in

/usr/local/lib/python3.6/dist-packages/torch/_ops.py in __getattr__(self, op_name)
---> 61         op = torch._C._jit_get_operation(qualified_op_name)

RuntimeError: No such operator torchvision::nms`

No matter if I use nightly build or master clone, e.g.
pip install --pre torch torchvision -f https://download.pytorch.org/whl/nightly/cu100/torch_nightly.html

How to debug setup.py to track where comilation/loading fails?

[fmassa]

Hi,

There is currently a problem with the torchvision wheels for the nightlies, they haven't been updated in more than 10 days.

The error you are getting indicates that you haven't compiled the new torchvision extensions.
For that, you should clone the repo, uninstall torchvision, remove any potential pre-built version (via python setup.py clean), and then re-install it with python setup.py install.

This should work I believe.

cc @soumith for the problem pushing nightlies for torchvision

[soldierofhell]

@fmassa, unfortunatelly it still doesn't work even on clean simple install path

mkvirtualenv pt1
pip install --pre torch -f https://download.pytorch.org/whl/nightly/cu100/torch_nightly.html
pip install numpy six
git clone https://github.com/pytorch/vision.git
cd vision
python setup.py install

I don't see any signs of errors during compilation process

[soldierofhell]

Ok, I see a problem in

vision/torchvision/ops/boxes.py

Line 31 in bf85957

return torch.ops.torchvision.nms(boxes, scores, iou_threshold)

Should there be return torchvision.ops.nms(boxes, scores, iou_threshold)?

[soldierofhell]

Sorry, I messed up sematics. torch.ops.torchvision.nms is internal for loaded op and torchvision.ops.nms is external for python wrapper

[macimovic]

Hi I am getting the same error. Can you please help me?

[soldierofhell]

I must say I didn't managed to fix it (didn't had enough time to dig into torchscript custom ops naming rules). I think there's indeed a problem and I think the tests should fail on this issue. @fmassa as this is observed by other people, please take a look at it

[fmassa]

Hi,

Can you print torch.__version__ and torchvision.__version__?

What is a bit confusing now is that torchvision nightly requires torch 1.3.0, and NOT a torch nightly, so this might be the reason

[fmassa]

As I've mentioned in #1489, I'm going to be changing the torchvision nightlies to depend on PyTorch nightly.

[macimovic]

torch: 1.4.0.dev20191016+cu100
torchvision: 0.5.0.dev20191017+cu100
I am using CUDA 10.0

[soldierofhell]

I'll check 1.3.0, because I used torch nightly, but I reported this error before 1.3.0 release

[macimovic]

Hi, I managed to find a compatible (working) pair of torchvision and torch.
torch: 1.3.0
torchvision: 0.4.1