Path doesn't calculate

[Yyote]

I am using turtlebot3_slam to create a map and it requires an rviz instance to be running and astar also launches rviz. So I commented rviz launch in turtlebot3_slam.launch and now they work together well if astar is launched first. Except astar doesn't publish anything in /nav_path.

[lh9171338]

Check whether the topics subscribed by the astar node (including /map, /initialpose, and move_base_simple/goal) have data.