how to solve "import error" when training

[realgump]

I am just install the environment by the step of readme. However, when I run:

python tools/train.py configs/textrecog/svtr/svtr-tiny_20e_st_mj.py

there's an error occurs:

ImportError: /Anaconda/envs/mmocr/lib/python3.8/site-packages/mmcv/_ext.cpython-38-x86_64-linux-gnu.so: undefined symbol: _ZN3c105ErrorC2ENS_14SourceLocationESs

I have reinstall the mmcv but it doesn't work.

[gaotongxiao]

MMCV has not been installed correctly, usually using mim to install mmcv again can prevent this from happening.

pip uninstall mmcv
pip install openmim
mim install 'mmcv>=2.0.0rc1'

If that doesn't work, you can paste the full installation log of MMCV here so that we can identify the problem.