"No card found to record program"

[mate]

Just disabling cards in TV Server or stopping the service would have been enough if TVService had the cards in use. Also if that was the case I'd expect a "Fatal" error on tuning with ARGUS Recorder. Was the error "No card found to record program" at tuning or were there yellow icons on all Upcoming Recordings?

It was the yellow exclamation mark in the EPG / Upcoming Recordings.