Stop execution of one or more tasks after any currently running action has finished.
If a task is specified, then all tasks with the same name currently executing are stopped.
If no task is specified, the current task is stopped (but not other tasks with the same name).
If With Error is checked, the task(s) are marked as finished due to an error.
Note: to stop a different task will often require that it has a lower priority than the task with the Stop action, since otherwise the Stop action will perhaps never be executed.
Currently running actions in a different task will not be interupted by a Stop action, with the exception of Play Ringtone and a non-root Run Shell.