Bolt can no longer see Tivo HD box (C423 error)

I very recently started seeing the C423 error msg "There may be a problem with your home network or the network connection on your tivo boxes, or the box may have been unplugged." I have restarted both TiVo boxes, successfully connected back to the mothership on both, I see both devices when I do a lan scan and network status on both seems just fine and the IP addrs check out.

The Tivo HD can see the Bolt and display/transfer files from the Bolt, but the Bolt cannot see the TiVo HD....

Bolt can no longer see Tivo HD box (C423 error)

Bolt can no longer see Tivo HD box (C423 error)