I suspect you just need to update 'hamlib' in WSJT-X.? The definition for QMX was changed recently, and something broke with it in hamlib 4.6.1, so you need to update to hamlib 4.6.2 or greater.
There is a button to update hamlib in WSJT-x.? Unfortunately, that may not work (it is not functional on my machine), so you have to download hamlib manually, and copy the new "lib-hamlib-4.dll" file into your wsjtx/bin folder.
?
Or go back to using Kenwood TS480 as your rig type.
?
Stan KC7XE
?
