# problem at modifiying a map

Hello,

at the moment I am trying to get through the turtlebot tutorial. http://wiki.ros.org/turtlebot_stage/T... Unfortunately, I am stuck at this point:

Now simply start the simulator and rviz up with following line:

roslaunch turtlebot_stage stage_tutorial.launch map_file:="~/stageTutorial/tutorial.yaml" world_file:="~/stageTutorial/tutorial.world"

I entered: