robotis@robotis-op3 ~ $ roslaunch op3_action_editor op3_action_editon.launch
[op3_action_editon.launch] is neither a launch file in package [op3_action_editor] nor is [op3_action_editor] a launch file name
The traceback for the exception was written to the log file
Please note below correct command for launching action editor from OP3 eManual.
$ roslaunch op3_action_editor op3_action_editor.launch
Please also note that other programs such as op3_manager, op3_offset_tuner, op3_walking_tuner should not be running when executing the action editor.
In order to terminate the demo program that is running based on op3_manager, you can enter below command in the OP3 terminal.
$ sudo service OP3-demo stop
Please make sure to enter the correct launch file name.
It seems like you are using "op3_action_edition.launch", but this has to be revised to "op3_action_editor.launch".
Using [Tab] key on the keyboard will enable autocomplete the command or file name in linux that helps to avoid any typo.