Intermittent Error V58

Several times a day, when watching cable channels on the TiVo Premier - but never when watching OTA channels - the error message V58 "channel not authorized" appears for about 3 minutes, then the channel reappears. On recorded programs, there is frequently also a 3 minute gap in the recording. TiVo and the cable system blame each other for this problem, so it continues unresolved. Does anyone else have a suggestion?

Some facts: I do not use a tuning adapter; I have a Motorola signal...

Intermittent Error V58

Intermittent Error V58