How are files organized?

[York1996OutLook]

Thank you for participating in our evaluation!
mkdir: cannot create directory ‘../../eval_kitti/results/exp1/data12/plot’: File exists
Loading detections...
number of files for evaluation: 0

why 0?

[zwqnju]

groundtruth_dir  (just the label_2 folder in KITTI dataset)
     |----000000.txt
     |----000001.txt

result_dir
     |----data
            |----000000.txt
            |----000001.txt

Run:

./evaluate_object_3d_offline groundtruth_dir result_dir