Results 2 issues of Kevin Li Sun

Hi guys, I got this error when I tried to launch the "hdl_graph_slam_xxx.launch" files (on both 400 and 501 bags, the g2o version is the one mentioned on the README...

By any chance, could you provide an example without the usage of odometry and imu? That is only use the 3D Lidar scans for localization. Thanks!