problem at modifiying a map

edit

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:

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

and I received this:

[stage_tutorial.launch] is neither a launch file in package [turtlebot_stage] nor is [turtlebot_stage] a launch file name The traceback for the exception was written to the log file

The files are in the folder: /home/myusername/stageTutorial

With roslaunch turtlebot_stage turtlebot_in_stage.launch the simulator appears.

Can you please help me to rviz up the files?

With best regards