opened
gaopenggang
username_0
Hi ,
when  I run this code, I encountered  this error.

[ WARN] [1531246455.136213972, 45.726000000]: Timed out waiting for transform from base_footprint to map to become available before running costmap, tf error: canTransform: target_frame map does not exist.. canTransform returned after 45.726 timeout was 0.1.

[gazebo_gui-3] process has died [pid 15609, exit code 139, cmd /opt/ros/kinetic/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/gao/.ros/log/9a1c10a8-844f-11e8-98c9-000c2993f013/gazebo_gui-3.log].
log file: /home/gao/.ros/log/9a1c10a8-844f-11e8-98c9-000c2993f013/gazebo_gui-3*.log

[gazebo-2] process has died [pid 15607, exit code 134, cmd /opt/ros/kinetic/lib/gazebo_ros/gzserver -e ode /home/gao/catkin_ws/src/turtlebot_rrt/maps/simple_maze.world __name:=gazebo __log:=/home/gao/.ros/log/9a1c10a8-844f-11e8-98c9-000c2993f013/gazebo-2.log].
log file: /home/gao/.ros/log/9a1c10a8-844f-11e8-98c9-000c2993f013/gazebo-2*.log

Could you give me some advice?
tf error: canTransform: target_frame map does not exist..
issue
created
saaries
username_1
Hello, I met this pro.

I fixed it by edit the file:

![image](https://user-images.githubusercontent.com/28039673/50756003-be153a00-1295-11e9-9cfd-5576c6e7ea17.png)

notice the first line, you should set it to the path where the map.pgm is
![image](https://user-images.githubusercontent.com/28039673/50756044-db4a0880-1295-11e9-9812-3e32bd9211f0.png)
comment
created
saaries
username_1
By doing these steps, you can also fix the problem:
【RobotModel 】（State: Error）
![image](https://user-images.githubusercontent.com/28039673/50756125-18ae9600-1296-11e9-9f5c-77f7cba420e8.png)
comment
created
darshankt
username_2
Check whether laser sensor publishing scan data on /scan topic or not. If not fix the laser sensor to publish scan data on topic. Then try
comment