APX APX 8000 XE Scan button question

[Glockorola]

I have an APX8000XE and am trying to set the big single dot ACC button on the bottom left side of the remote spkr mic (immediately below the PTT bar) to SCAN. No matter what I do, the SCAN option is RED in the CPS, and it says 'Invalid.', so the CPS is denying this. However, SCAN is successfully set from the front panel of the radio, via the single dot soft key, and it works perfectly fine.

Does anyone know what the issue is?

Thanks very kindly for any help!

 

[GTR8000]

You cannot have a SCAN button/switch and a SCAN menu item. One or the other. You can duplicate the SCAN feature on a radio button + an accessory button, however, so you can map the 1 dot button on the radio itself and the 1 dot button on the RSM to be SCAN.

If you need the SCAN feature on the RSM, lose the SCAN menu item.