I have had Tivo for over 15 years. Never had this issue before. Single channels seem to lose guide data for a few days... then some time slots for that channel come back and some are missing.. then all gone again. Only happens for one or two channels. The last few days it has been ABC local channel, and we have missed some shows being tivoed because of it. I have rebooted... made network connection... nothing helps. ABC repopulated today except for 8-11pm slots all blank... now it is back to "To be announced" on the left pane (old GUI), and completely blank on the right pane (time slots). Right now I see four other channels that have this issue... out of hundreds. Any advice on what is going on would be greatly appreciated!