OK that is not the exact code but it seems that in the last few weeks I have been seeing more of these errors. I’ll be changing channels and I get a blue screen with a that error. Sometimes closing VMC helps. Sometimes changing channels fixes it. I am not sure if it is related to multiple channels being recorded and I change a channel and there is no tuner available.
And BTW shouldn’t either the guide somehow inform you, either by highlighting non accessible channels due to all the tuners in use or give you a prompt to cancel a recording if you go to a channel that requires an available tuner.