error while performing visual hull process

[roboticist-blip]

python3 visual_hull.py --sparse_id 4 --data_dir data/mip360/kitchen --reso 2 --not_vis
Traceback (most recent call last):
File "/home/vlsiworks/GaussianObject/visual_hull.py", line 11, in
from scene.dataset_readers import sceneLoadTypeCallbacks
File "/home/vlsiworks/GaussianObject/scene/init.py", line 16, in
from scene.dataset_readers import sceneLoadTypeCallbacks
File "/home/vlsiworks/GaussianObject/scene/dataset_readers.py", line 26, in
from scene.gaussian_model import BasicPointCloud
File "/home/vlsiworks/GaussianObject/scene/gaussian_model.py", line 20, in
from simple_knn._C import distCUDA2
ImportError: /home/vlsiworks/GaussianObject/submodules/simple-knn/simple_knn/_C.cpython-310-x86_64-linux-gnu.so: undefined symbol: _ZN3c106SymInt19promote_to_negativeEv

[chensjtu]

Hi! Sorry for the late reply! This error almost always means the simple-knn extension was compiled against a different PyTorch version than the one you’re running (ABI mismatch). Rebuilding the CUDA extensions against your current Torch/CUDA should fix it. (Same symptom is documented in 3DGS repos when Torch/extension versions don’t match. Maybe a simple uninstall / reinstall helps.