furthest_point_sample.py error

[TabGuigui]

Hi, thank you for sharing your work.
However, when I use
python tools/create_data.py nuscenes --root-path ./data/nuscenes --out-dir ./data --version v1.0 --canbus ./data
to generate the info, some thing goes wrong like:
ImportError: /home/guixingtai/anaconda3/envs/occformer/lib/python3.7/site-packages/mmdet3d-0.17.1-py3.7-linux-x86_64.egg/mmdet3d/ops/furthest_point_sample/furthest_point_sample_ext.cpython-37m-x86_64-linux-gnu.so: undefined symbol: _Z39furthest_point_sampling_kernel_launcheriiiPKfPfPiP11CUstream_st

can you help me?
thanks