Environment

[yjh576]

When torch_version==1.3.0 OpenPCDet reports an error:

from models.votenet_iou_branch import VoteNet

File "/home/point/3DIoUMatch/models/votenet_iou_branch.py", line 17, in from models.backbone_module import Pointnet2Backbone File "/home/point/3DIoUMatch/models/backbone_module.py", line 19, in from pointnet2_modules import PointnetSAModuleVotes, PointnetFPModule File "/home/point/3DIoUMatch/pointnet2/pointnet2_modules.py", line 26, in import pointnet2_utils File "/home/point/3DIoUMatch/pointnet2/pointnet2_utils.py", line 31, in "Could not import _ext module.\n" ImportError: Could not import _ext module. Please see the setup instructions in the README: https://github.com/erikwijmans/Pointnet2_PyTorch/blob/master/README.rst

When torch_version==1.5.1, pointnet2 reports an error:

import pointnet2._ext as _ext

ModuleNotFoundError: No module named 'pointnet2._ext'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/home/point/3DIoUMatch/pointnet2/pointnet2_utils.py", line 27, in import pointnet2_ops._ext as _ext ModuleNotFoundError: No module named 'pointnet2_ops'

Could you give me adivice? thanks!

[yezhen17]

Hi @yjh576 ,

I don't think OpenPCDet is involved. Did you successful install pointnet2 as instructed here?

[yjh576]

Yes, I install it step by step according to readme.txt

[yezhen17]

If you switched to torch 1.5 after first installing pointnet2 with torch 1.3, maybe you can try

rm -rf ./build
find . -name "*.so" | xargs rm

under the pointnet2 folder, and then reinstall pointnet2.

If it still fails, maybe you can install pointnet2 from the original repo and skip installing it from the pointnet2 folder.