ImportError: DLL load failed while importing _ext: 找不到指定的模組。

[wen0418]

met a problem when i using demo：
Traceback (most recent call last):
File "demo/pcd_demo.py", line 4, in
from mmdet3d.apis import inference_detector, init_model, show_result_meshlab
File "d:\mmdetection3d\mmdet3d\apis_init_.py", line 2, in
from .inference import (convert_SyncBN, inference_detector,
File "d:\mmdetection3d\mmdet3d\apis\inference.py", line 12, in
from mmdet3d.core import (Box3DMode, CameraInstance3DBoxes, Coord3DMode,
File "d:\mmdetection3d\mmdet3d\core_init_.py", line 2, in
from .anchor import * # noqa: F401, F403
File "d:\mmdetection3d\mmdet3d\core\anchor_init_.py", line 2, in
from mmdet.core.anchor import build_prior_generator
File "d:\mmdetection\mmdet\core_init_.py", line 3, in
from .bbox import * # noqa: F401, F403
File "d:\mmdetection\mmdet\core\bbox_init_.py", line 8, in
from .samplers import (BaseSampler, CombinedSampler,
File "d:\mmdetection\mmdet\core\bbox\samplers_init_.py", line 12, in
from .score_hlr_sampler import ScoreHLRSampler
File "d:\mmdetection\mmdet\core\bbox\samplers\score_hlr_sampler.py", line 3, in
from mmcv.ops import nms_match
File "D:\anaconda3\envs\openmmlab\lib\site-packages\mmcv\ops_init_.py", line 2, in
from .active_rotated_filter import active_rotated_filter
File "D:\anaconda3\envs\openmmlab\lib\site-packages\mmcv\ops\active_rotated_filter.py", line 10, in
ext_module = ext_loader.load_ext(
File "D:\anaconda3\envs\openmmlab\lib\site-packages\mmcv\utils\ext_loader.py", line 13, in load_ext
ext = importlib.import_module('mmcv.' + name)
File "D:\anaconda3\envs\openmmlab\lib\importlib_init_.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ImportError: DLL load failed while importing _ext: 找不到指定的模組。

what's the problem of here?

[JingweiZhang12]

Please check the rightness of compiling MMCV OPs.

[wen0418]

how to?
i using torch 1.12.1
cuda 11.6

[JingweiZhang12]

https://github.com/open-mmlab/mmcv/blob/master/docs/en/get_started/installation.md. Are you sure following the guides in these docs?