Thanks for the help.  Deleting the neighborhood manager didn't work, but it did point me in the right direction; the neighborhood.package was missing from the backup.  I wnet back to an older backup, and it loaded fine.

The neighborhood I've been playing was fubared, so I went to replace it with a non-fubared backup.  When I installed a backup in the past, I just deleted the old hood in game, then copied the backup to the right folder. I did that this time, but when I opened the game, the hood was not showing up in the neighborhood viewer.