Cannot start up music player 'string'
The Juke_Box custom server could not start up the specified player process.
Check that the program name is specified relative to the $DB/current_dir/CA directory, that the program exists and has execute permission for the userid that started the Juke_Box custom server, and that it is linked using Ld (in the same way that the pl_seg and pl_elem music players are).
Check that build and install versions of the Juke_Box custom server, and the music players match.
White (error_id = 20501)
Log, System Monitor