ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
1 | initial version |
The reason why rosversion roslaunch
experiences this occur is most likely due to not being sourced correctly. If it isn't sourced correctly, it wouldn't be able to locate ROS, thus not being able to find and output the version of your ros.
Double check that you source your bash correctly with source ~/opt/ros/kinetic/setup.bash
. If the error still occurs, make sure you have sourced your workspace with source ~/ros_catkin_ws/install_isolated/setup.bash
.