Yes MConfig would usually automatically show a comms connection.

Can you add one manually?

Also, perhaps try to type to one of the 2-channel types on the list, as I wonder if the multichannel types expect a Meridian processor to be there…? Try type 3, perhaps?

I’ll be back home in a couple of hours and have a look in MConfig to see if I can see anything else which might affect things.

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502