It's not critical for system functionality.
Just because some file doesn't open and shows up in SnoopDOS doesn't mean it necessarily is an error.
screennotify.library allows applications to get notify messages when Workbench screen is about to close/open, allowing the applications to "get out of the way", and reopen again.
http://aminet.net/package/util/libs/ScreenNotify10You can install the library, but it won't fix your problem with FroggerNG.
