train problem

[lhjudxj]

Hi Team,
I now want to learn how to use the OpenSeg open source toolbox, and I am currently trying to use the Rangnet++ algorithm in the toolbox for training, and after modifying the DATA_PATH parameters in /OpenPCSeg/tools/cfgs/range/rangenet_darknet53.yaml, the following error is reported after executing the python train.py:

Could this be a matter of the construction of the dataset, and is there a more detailed distribution of the dataset? Mainly because the arrangement is different from that on the official website. Or is there something wrong? The environment is the same as INSTALL.md.
Please take a look and get back to me
Thank you

[mp0312]

数据集应该是：sequence ---> 00 ---> velodyne&labels&calib.txt