Garmin Descent Mk3i error - SAC/RMV/ATR Not Included. ?

I am getting this message on the watch when I try to add SAC

SAC/RMV/ATR. Not Included

I've read through the literature on this site. 

I had abandoned this last year but figured I would give it one more try before selling the Garmin and adding a tranceiver to my Perdix.

Any thoughts would be helpful.

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