Error installing mmdet3d, IndexError out of range

[QingyangLiu]

After I built the Docker image and ran the docker container, I git pulled the repo and ran "pip install -v -e ." However, I then got the following error message when it was trying to install mmdet3d:

File "/opt/conda/lib/python3.8/site-packages/torch/utils/cpp_extension.py", line 1606, in _get_cuda_arch_flags
arch_list[-1] += '+PTX'
IndexError: list index out of range
error: subprocess-exited-with-error

I'm confused as to how to proceed. How should this be fixed? I attached the full error message.

[brankyy]

export TORCH_CUDA_ARCH_LIST="8.6+PTX"
works for me with RTX3090.
try export TORCH_CUDA_ARCH_LIST="YOUR_GPU_CC+PTX"