Excercise 5.6 Rviz does not start anymore

when doing a “roslaunch rviz rviz” I get

… logging to /home/user/.ros/log/4790bbd6-8f8d-11ea-999a-0a621c7c505a/roslaunch-rosdscomputer-9557.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Invalid roslaunch XML syntax: not well-formed (invalid token): line 1, column 0
The traceback for the exception was written to the log file

the log shows this
[roslaunch][INFO] 2020-05-06 11:36:09,055: starting in server mode
[roslaunch.parent][INFO] 2020-05-06 11:36:09,056: starting roslaunch parent run
[roslaunch][INFO] 2020-05-06 11:36:09,056: loading roscore config file /opt/ros/kinetic/etc/ros/roscore.xml
[roslaunch][INFO] 2020-05-06 11:36:11,489: Added core node of type [rosout/rosout] in namespace [/]
[roslaunch.config][INFO] 2020-05-06 11:36:11,490: loading config file /opt/ros/kinetic/lib/rviz/rviz
[roslaunch][ERROR] 2020-05-06 11:36:11,490: Invalid roslaunch XML syntax: not well-formed (invalid token): line 1, column 0
[roslaunch][ERROR] 2020-05-06 11:36:11,490: The traceback for the exception was written to the log file

Also I get from time to time this

[ERROR] [1588687076.524986500, 2151.290000000]: Couldn’t find an AF_INET address for [rosdscomputer]
[ERROR] [1588687076.525039221, 2151.290000000]: Failed to create outgoing connection

Teleop in the section works.
Saving the map through map server works but does not show the new loaded obstacle

is there a clean/stabilize for the the environment ?

does work now again…not sure how long however done…

Hello @vkuehn,

In order to start RViz you don’t have to use the roslaunch command. The correct command to start it is this one:

rosrun rviz rviz

Best,

Oh man what a silly one. Sure meantime I accidentally used the right command.