Sim, I have had success with GPSMAP62S as mentioned in my post no 46 above. I have also updated the unit to the latest firmware to enable Garmin Spanner to work the unit with Memory map. I have had it working by using th unit ID and now using the SD card CID. I assume you must be doing most of it correctly to be able to get error message. I read somewhere that people were accidentally adding an extra digit to the unlock code or an odd space. Perhaps if you post your unit ID here or PM me with it I can generate an unlock code and see if that works for you.
I have only tried copying image to SD card and not unit itself.
Ocicat
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