Some problems occurred during the installation of mmdetection according to the official installation tutorial. My environmental information is as follows:

The final error message is as follows:

From the mmcv compiler, you can see the mmcv CUDA compiler: not available.

The reason is that the mmcv full script I use is:

pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.9.1/index.html

Use the following script to install:

pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.9.0/index.html

The reason can be found on the official website:

The reason is that mmcv full has only been compiled in pytorch 1.X.0.