Wrong when running robotcar dataset

[kakayao77]

Hi，thank you very much for the project code，and the following problem occurs when I running the robotcar dataset, do you know the solution, thanks for your guidance.
Save result in result/tmp/robotcar/? [y/n]y
/home/wsy/DF-VO-master1/tools/evaluation/robotcar/sdk_python/interpolate_poses.py:143: RuntimeWarning: divide by zero encountered in floor_divide
(pose_timestamps[upper_indices] - pose_timestamps[lower_indices])
==> Initialize LiteFlowNet with [model_zoo/optical_flow/LiteFlowNet/network-default.pytorch]:
==> Initialize Depth-CNN with [model_zoo/depth/kitti_odom/stereo/]
==> Start DF-VO
==> Running sequence: sample
Start with frame: 1
0it [00:00, ?it/s]
=> Finish!
The result is saved in [result/tmp/robotcar/].
Save VO map.
Trajectory saved.
----- time breakdown -----
Group [single]:
It gets an empty result.