Hey, Yep, I’ve tried with official mapping file as well. Same result. I discovered a video where a Brazilian guy has exactly same issue, Calibration error messages but good sound and control of TCV in Traktor Scratch Pro.
You can see how he is getting calibration messages and, if you jump to 4.15, he explains how to set the channel selectors in order to get sound.
Not sure what can I do to get this solved. Seems a bug to me in Denon MC6000 input channels.