Could you please help to check below error, thank you!
terminal output:
ubuntu@ubuntu-VirtualBox:~$ rostopic list
/battery_state
/cmd_vel
/diagnostics
/joint_states
/joy
/left_error
/motor_node/parameter_descriptions
/motor_node/parameter_updates
/odom
/right_error
/rosbridge_ws/client_count
/rosbridge_ws/connected_clients
/rosbridge_wss/client_count
/rosbridge_wss/connected_clients
/rosout
/rosout_agg
/statistics
/tf
/tf2_web_republisher/cancel
/tf2_web_republisher/feedback
/tf2_web_republisher/goal
/tf2_web_republisher/result
/tf2_web_republisher/status
/tf_static
/ubiquity_velocity_controller/parameter_descriptions
/ubiquity_velocity_controller/parameter_updates
ubuntu@ubuntu-VirtualBox:~$ sudo apt install ros-kinetic-magni-robot
Reading package lists… Done
Building dependency tree
Reading state information… Done
ros-kinetic-magni-robot is already the newest version (0.2.1-0xenial-20171208-085656-0800).
The following packages were automatically installed and are no longer required:
libllvm4.0 libtinyxml2-dev python-wxtools snapd-login-service
Use ‘sudo apt autoremove’ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
ubuntu@ubuntu-VirtualBox:~$ roslaunch magni_viz view_robot.launch
[view_robot.launch] is neither a launch file in package [magni_viz] nor is [magni_viz] a launch file name
The traceback for the exception was written to the log file