package [ropigo] nor is [ropigo] a launch file nameの対策

https://answers.ros.org/question/143496/roslaunch-is-neither-a-launch-file-in-package-nor-is-a-launch-file-name/
参考

pi@pi-Raspberry3:~$ roslaunch ropigo ropigo.launch
[ropigo.launch] is neither a launch file in package [ropigo] nor is [ropigo] a launch file name
The traceback for the exception was written to the log file

とエラー出たら・・・・

$ source /home/pi/catkin_ws/devel/setup.bash
のコマンドでなんとかエラー解決・・・

$ source /home/pi/gopigo_ws/devel/setup.bash
のコマンドでなんとかエラー解決・・・

$ source /home/pi/catkin_workspace/devel/setup.bash
$ source /home/pi/workspace/devel/setup.bash

以上

$ echo “source /home/pi/gopigo_ws/devel/setup.bash” >> ~/.bashrc
$ source ~/.bashrc

で直しておく。（2017/12/16）