Since I've upgraded to this system 6 weeks ago, I've had intermittent problems with playback, both live and recorded past shows. When I attempt to playback a previously recorded show, a message to the effect that the program is not available "at this time" with suggestions to try again later or call Cox support with error code 18.104.22.168. Most of the time, trying later just gets the same result; on one occasion, a day after getting the original error message, the show played back normally. On at least one occasion, the error message occurred midway in an hour recording. Several tries to replay the show yielded the same error message at the same point. On live recording, intermittently I can't reverse or fast forward - it either doesn't move or jumps to the end or beginning of the recording. Problems occur on both host and client box. Rebooting host DVR solves the problems temporarily though not for previously recorded shows.
So far five calls to tech support and four visits from "technicians" - no consensus as to what the problem is or more importantly the solution. So far the host DVR has been switched once, both jacks and cables from jacks to boxes have been replaced; per tech support "signals are good" and outside connections have been checked by all four techs. Currently I'm awaiting a call from "IT" regarding the possibility of a software problem.
Would appreciate any thoughts as to nature of problem and possible fixes.