import _C.nms causes undefined symbol error

Question

import _C.nms causes undefined symbol error

Opened this issue 3 years ago · 8 comments

maybe some useful build flags are missing

Answer 1 · 2021-09-28T06:12:46.000Z

setup falied.

Answer 2 · 2021-11-12T18:41:29.000Z

Have you solved the issue? Usually, it is related to building the environment. Could you try the steps carefully again?
Otherwise, could you share the details about the issue?

Answer 3 · 2021-11-13T00:53:21.000Z

I followed all the steps carefully again, everything compiles but the demo fails with an undefined symbol error:
CUDA_VISIBLE_DEVICES=0 python demo.py --cuda --checkepoch=8 --checkpoint=132028

  File "demo.py", line 34, in <module>
    from model.roi_layers import nms
  File "/home/nik/Desktop/progetti/hand_object_detector/lib/model/roi_layers/__init__.py", line 3, in <module>
    from .nms import nms
  File "/home/nik/Desktop/progetti/hand_object_detector/lib/model/roi_layers/nms.py", line 3, in <module>
    from model import _C
ImportError: /home/nik/Desktop/progetti/hand_object_detector/lib/model/_C.cpython-36m-x86_64-linux-gnu.so: undefined symbol: _ZNSt15__exception_ptr13exception_ptr10_M_releaseEv

Answer 4 · 2021-11-13T01:01:11.000Z

Can you take a look and try this fix (jwyang/faster-rcnn.pytorch#503) from faster-rcnn.pytorch and see if it works?

Answer 5 · 2021-11-13T02:04:08.000Z

I tried many versions of torch (1.0.0, 1.0.1, 1.3.0) and rebuilt what's under lib many times but I couldn't manage to solve the environment's issues. The best scenario I got was a numpy import error but it wasn't solveable due to many dependency conflicts and I couldn't reproduce it anyways.

Answer 6 · 2021-11-13T02:08:13.000Z

this are my system's specs if it can be useful in any way
Kernel: 5.15.2-arch1-1 x86_64 bits: 64 compiler: gcc v: 11.1.0 Distro: Arch Linux
cuda 11.5.0-1
cudnn 8.2.4.15-1

Answer 7 · 2023-07-10T04:57:00.000Z

Encountering the same issue, are there any updates on how this was resolved?

Answer 8 · 2023-07-10T21:39:25.000Z

Update: this fix works for me for now. However, because it differs from the environment specifications in the ReadMe, I wouldn't be surprised if this caused errors for me further down the line, so I would not consider this resolved unless the code authors can verify that this environment setup also works for the codebase.