Get back from vacation. Check into the failed backups as per the previous post.
1 server with 4 databases, 2 24x7 high usage systems (200-300 users), 1 reporting DB (combining the previous two) and 1 sunsetted system DB (almost zero users). No backups (rman) for 16 days.
6 different people get the emails, including a manager and the lead system administrator. Nobody looked at the problem, everybody read the emails. Ignoring 16 obvious FAILED emails.
Fixed the problem which was the scratch backup disk was simply out of space on the server, took about 3 minutes. The best answer was "I thought it could wait until you get back."
I need a vacation.