For the first time ever I had my 10-250 screw up also. Last night it recorded the first 26 minutes of 24 and quit. I then noticed that it had not recorded some other shows. Error 4 was the reason.
My DSR-7000 had two listings for last night's episode of Two and a Half Men. One had a duration of 0 minutes, the other was 21 minutes (the 1st 9 minutes were missing).
My HR10-250 recorded the show in it's entirety from the OTA channel.