change topic name from "laser_scan" to "scan"

Hi I successively run the cartographer_trutlebot_demo.bag. I recorded my own bag, trying to run the cartographer_turtlebot based on that.

The terminal outputs

[FATAL] [1582746910.357573635]: Error opening file: all-2020-02-26-18-49-30.bag ....some [INFO] of find the lua [playbag-5] process has died [pid 9519, exit code 1, cmd /opt/ros/kinetic/lib/rosbag/play --clock all-2020-02-26-18-49-30.bag name:=playbag log:=/home/bingxin/.ros/log/e48833da-58d1-11ea-a734-000c29f89067/playbag-5.log]. log file: /home/bingxin/.ros/log/e48833da-58d1-11ea-a734-000c29f89067/playbag-5*.log [ WARN] [1582746913.431290607]: W0226 19:55:13.000000 9488 node.cc:857] Expected topic "scan" (trajectory 0) (resolved topic "/scan") but no publisher is currently active. [ WARN] [1582746913.431528522]: W0226 19:55:13.000000 9488 node.cc:857] Expected topic "odom" (trajectory 0) (resolved topic "/odom") but no publisher is currently active. [ WARN] [1582746913.431689439]: W0226 19:55:13.000000 9488 node.cc:866] Currently available topics are: /move_base_simple/goal,/constraint_list,/submap_list,/scan_matched_points2,/rosout,/initialpose,/tf,/clicked_point,/imu,/rosout_agg,/map,/trajectory_node_list,/landmark_poses_list,

Thank you

cartographer-project / cartographer_turtlebot

change topic name from "laser_scan" to "scan" #102

The terminal outputs