How did you get nuscenes_cam and the pkl files inside?

[myn1szh]

When try to load train.pkl,i got errors:

loading ann_file = <_io.BufferedReader name='data/nuscenes_cam/nuscenes_infos_train.pkl'>
Traceback (most recent call last):
File "/usr/local/lib64/python3.8/site-packages/mmcv/utils/registry.py", line 52, in build_from_cfg
return obj_cls(**args)
File "/Sparse4D/projects/mmdet3d_plugin/datasets/nuscenes_3d_det_track_dataset.py", line 142, in init
super().init(
File "/usr/local/lib/python3.8/site-packages/mmdet3d/datasets/custom_3d.py", line 88, in init
self.data_infos = self.load_annotations(open(local_path, 'rb'))
File "/Sparse4D/projects/mmdet3d_plugin/datasets/nuscenes_3d_det_track_dataset.py", line 484, in load_annotations
data = mmcv.load(ann_file)
File "/usr/local/lib64/python3.8/site-packages/mmcv/fileio/io.py", line 51, in load
raise TypeError(f'Unsupported format: {file_format}')
TypeError: Unsupported format: None

[wzh506]

me,too

[42nick]

Same issue here.