Hey,
did a test run, and it appears that the line is added correctly. But I seem to be getting this error
11:59:35: Running command: setref
11:59:35: This command can only be used when a sequence is loaded.
11:59:35: Error in line 62: ‘setref pp_light 4’.
11:59:35: Exiting batch processing.
11:59:35: Setting CWD (Current Working Directory) to ‘/Volumes/One Touch/Stacks/Liberty:Carina.iso1250.135mm.f2 20 sec’
11:59:35: Script execution failed.