pointnet2 installation failed

[Leerw]

After I succeed running python setup.py install, I failed to run python models/votenet.py as follows:

Traceback (most recent call last):
  File "/mnt/8T/leerw/code/votenet/pointnet2/pointnet2_utils.py", line 26, in <module>
    import pointnet2._ext as _ext
ImportError: dynamic module does not define module export function (PyInit__ext)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "models/votenet.py", line 19, in <module>
    from backbone_module import Pointnet2Backbone
  File "/mnt/8T/leerw/code/votenet/models/backbone_module.py", line 19, in <module>
    from pointnet2_modules import PointnetSAModuleVotes, PointnetFPModule
  File "/mnt/8T/leerw/code/votenet/pointnet2/pointnet2_modules.py", line 21, in <module>
    import pointnet2_utils
  File "/mnt/8T/leerw/code/votenet/pointnet2/pointnet2_utils.py", line 30, in <module>
    "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

I can import torch; import pointnet2 without errors, but not when import torch; import pointnet2._ext as _ext

[StevenZzz07]

Hi! I am faced with exactly the same issue as yours. Installing PyTorch and Tensorflow, then running python setup.py install. When it comes to the next steps, the same bugs come out: "Could not import _ext module.\n". Have you solved this problems? Maybe we can discuss about it.

[StevenZzz07]

Hello, i have solved out this problem. I used another platform with GPU 1660ti and CUDA10.0, then the problem disappear. So the bug may be related to the CUDA version i guess.

[Leerw]

@StevenZzz07 Yes, I solved this issue, I have tensorflow-gpu==1.14 and pytorch==1.1.0 and CUDA 10.0 installed, I fixed it by install original Pointnet_Pytorch code the repo borrowed from and set the PYTHONPATH=folder of Pointnet_Pytorch. But I still do not know what is wrong with python setup.py install

[phy12321]

I met this error too. The problem in my case is that the python i use in command is system python,which locate in /usr/local/bin/... ,but i run my code in conda env. so i ran this :
/home/anaconda/envs/envs_name/bin/python setup.py install
then check if pointnet2 is installed in my conda envs:
conda list

and run :
python models/votenet.py
it works!

[mojoee]

For me, the problem was solved by installing the correct versions of tensorflow(1.14) and pytorch (1.1). However, another problem popped up afterwards.

[ch-sa]

For me the problem vanished after upgrading from python 3.6.8 to python 3.7.7.

[bigeyesung]

I have a similar problem. Solved by install CUDA 10.0. tensorflow1.14, pytorch 1.2