Windows下mmcv中importlib.import_module('mmcv.'_ext )报错ImportError: DLL load failed: 找不到指定的模块。

[mortal-Zero]

version:
Windows 10
VS2015
cuda 10.1
python 3.7
pytorch 1.6.0
torchvision 0.7.0
mmcv 1.4.0
mmdetection 2.18.0
mmocr 0.3.0
（There are no errors in install mmcv, build mmdet, build mmocr）

---

when i tried to train the maskrcnn for textdet from mmocr, but i got this ImportError.

cmd: python tools/train.py configs/textdet/maskrcnn/mask_rcnn_r50_fpn_160e_icdar2017.py

details: Traceback (most recent call last):
File "tools/train.py", line 17, in
from mmocr.apis import train_detector
File "e:\mmlab\mmocr-0.3.0\mmocr\apis_init_.py", line 2, in
from .inference import init_detector, model_inference
File "e:\mmlab\mmocr-0.3.0\mmocr\apis\inference.py", line 7, in
from mmcv.ops import RoIPool
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\ops_init_.py", line 2, in
from .assign_score_withk import assign_score_withk
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\ops\assign_score_withk.py", line 6, in
'ext', ['assign_score_withk_forward', 'assign_score_withk_backward'])
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\utils\ext_loader.py", line 14, in load_ext
ext = importlib.import_module('mmcv.' + name)
File "D:\Miniconda3\envs\mmlab\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ImportError: DLL load failed: 找不到指定的模块。

---

and i tried again in mmdet, train maskrcnn, got this Error again.

cmd: python tools/train.py configs\mask_rcnn\mask_rcnn_r50_fpn_1x_coco.py

Traceback (most recent call last):
File "tools/train.py", line 16, in
from mmdet.apis import set_random_seed, train_detector
File "e:\mmlab\mmdetection-2.18.0\mmdet\apis_init_.py", line 2, in
from .inference import (async_inference_detector, inference_detector,
File "e:\mmlab\mmdetection-2.18.0\mmdet\apis\inference.py", line 7, in
from mmcv.ops import RoIPool
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\ops_init_.py", line 2, in
from .assign_score_withk import assign_score_withk
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\ops\assign_score_withk.py", line 6, in
'ext', ['assign_score_withk_forward', 'assign_score_withk_backward'])
File "D:\Miniconda3\envs\mmlab\lib\site-packages\mmcv\utils\ext_loader.py", line 14, in load_ext
ext = importlib.import_module('mmcv.' + name)
File "D:\Miniconda3\envs\mmlab\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ImportError: DLL load failed: 找不到指定的模块。

[zhouzaida]

It seems like that you do not install mmcv-full. Please provide the output of pip list.

[mortal-Zero]

It seems like that you do not install mmcv-full. Please provide the output of pip list.

this is the pip list:

Package Version Location

---

addict 2.4.0
asynctest 0.13.0
atomicwrites 1.4.0
attrs 21.2.0
autopep8 1.5.7
certifi 2021.10.8
charset-normalizer 2.0.9
codecov 2.1.12
colorama 0.4.4
coverage 6.2
cycler 0.11.0
Cython 0.29.25
flake8 4.0.1
fonttools 4.28.3
future 0.18.2
idna 3.3
imageio 2.13.2
imgaug 0.4.0
importlib-metadata 4.2.0
importlib-resources 5.4.0
iniconfig 1.1.1
isort 5.10.1
jaraco.classes 3.2.1
jaraco.collections 3.4.0
jaraco.functools 3.4.0
jaraco.structures 2.1.0
jaraco.text 3.6.0
jaraco.ui 2.3.0
jaraco.windows 5.7.0
kiwisolver 1.3.2
kwarray 0.5.21
lanms-neo 1.0.2
llvmlite 0.37.0
lmdb 1.2.1
matplotlib 3.5.0
mccabe 0.6.1
mkl-fft 1.3.1
mkl-random 1.2.2
mkl-service 2.4.0
mmcv-full 1.4.0
mmdet 2.18.0 e:\mmlab\mmdetection-2.18.0
mmocr 0.3.0 e:\mmlab\mmocr-0.3.0
more-itertools 8.12.0
networkx 2.6.3
numba 0.54.1
numpy 1.20.3
olefile 0.46
opencv-python 4.5.4.60
ordered-set 4.0.2
packaging 21.3
path 16.2.0
Pillow 8.4.0
pip 21.2.4
pluggy 1.0.0
py 1.11.0
pyclipper 1.3.0.post2
pycocotools-windows 2.0.0.2
pycodestyle 2.8.0
pyflakes 2.4.0
pyparsing 3.0.6
pytest 6.2.5
pytest-cov 3.0.0
pytest-runner 5.3.1
python-dateutil 2.8.2
PyWavelets 1.2.0
PyYAML 6.0
rapidfuzz 1.8.3
regex 2021.11.10
requests 2.26.0
scikit-image 0.19.0
scipy 1.7.3
setuptools 58.0.4
setuptools-scm 6.3.2
Shapely 1.8.0
six 1.16.0
terminaltables 3.1.10
tifffile 2021.11.2
toml 0.10.2
tomli 1.2.2
torch 1.6.0
torchvision 0.7.0
typing_extensions 4.0.1
ubelt 0.10.2
urllib3 1.26.7
wheel 0.37.0
wincertstore 0.2
xdoctest 0.15.10
yapf 0.31.0
zipp 3.6.0

[zhouzaida]

What command did you use to install mmcv-full?

[mortal-Zero]

What command did you use to install mmcv-full?

pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.10.0/index.html

It comes from OpenMMLab知乎(https://zhuanlan.zhihu.com/p/441653536)

[zhouzaida]

What is your python version?

[mortal-Zero]

What is your python version?

python3.7 from miniconda

[mortal-Zero]

What is your python version?

conda create -n mmlab python=3.7 -y 
conda activate mmlab 
 
conda install pytorch==1.6.0 torchvision==0.7.0 cudatoolkit=10.1 -c pytorch -y 
# install the latest mmcv 
pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.10.0/index.html 

# install mmdetection 
cd mmdetection-2.18.0
pip install -r requirements/build.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

# install mmocr 
cd mmdetection-0.3.0
pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

I installed my environment using these commands.

[zhouzaida]

Ok, thanks for your report. I will try to re-produce the exception.

[mortal-Zero]

Ok, thanks for your report. I will try to re-produce the exception.

Also thank you very much for your help.

[zhouzaida]

What is your python version?

conda create -n mmlab python=3.7 -y 
conda activate mmlab 
 
conda install pytorch==1.6.0 torchvision==0.7.0 cudatoolkit=10.1 -c pytorch -y 
# install the latest mmcv 
pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.10.0/index.html 

# install mmdetection 
cd mmdetection-2.18.0
pip install -r requirements/build.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

# install mmocr 
cd mmdetection-0.3.0
pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

I installed my environment using these commands.

Hi @Baiyixuan1113 , there are several inconsistencies

• You installed the torch1.6.0 but installed mmcv-full built in torch1.10.0
• You installed the torch1.6.0 built in cuda10.1 but installed mmcv-full built in cuda10.2

[mortal-Zero]

What is your python version?

conda create -n mmlab python=3.7 -y 
conda activate mmlab 
 
conda install pytorch==1.6.0 torchvision==0.7.0 cudatoolkit=10.1 -c pytorch -y 
# install the latest mmcv 
pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.10.0/index.html 

# install mmdetection 
cd mmdetection-2.18.0
pip install -r requirements/build.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

# install mmocr 
cd mmdetection-0.3.0
pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install -v -e . 

I installed my environment using these commands.

Hi @Baiyixuan1113 , there are several inconsistencies

• You installed the torch1.6.0 but installed mmcv-full built in torch1.10.0
• You installed the torch1.6.0 built in cuda10.1 but installed mmcv-full built in cuda10.2

Ok, I will try again according to the version you provided.

[zhouzaida]

The correct command to install mmcv-full is pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu101/torch1.6.0/index.html

[mortal-Zero]

Correct command to install mmcv-full pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu101/torch1.6.0/index.html

Sorry for the late reply. I adjusted mmcv-full according to the method you said, and it worked.

[123456klk1]

What is your python version?

Will python version 3.6 have any impact？

[zhouzaida]

Hi @123456klk1 , did you meet the same error?

[wen0418]

i met the same error, can you help me? @zhouzaida

[gmy-gm]

@wen0418 hello，I don't know if you have solved the error. I met the same error when I install mmcv. I search the solution and find it. I hope it can help you if you have not solved the error. I use python3.8 pillow 9.3.0, but python3.8 should use 6.2.1. I use "pip uninstall pillow" and "pip install pillow==6.2.1" solve the question.

[Zhijing-W]

@zhouzaida ，Hi, I have smae issues. Can you check my version is appropriate or not? Thank you in advance.