Hi and welcome to GPS Power.
The gmapsupp.img and associated gmapsupp.unl file from the SD card obviously were never issued for the rino 610. The .unl file ties the .img file either to the SD card or to the device which it was originally issued for.
What you need to do is make a copy of the gmapsupp.img file and unlock it using [Only registered and activated users can see links. ]. Rename it to gmapprom.img and place it in the internal memory of the rino 610 in the folder Garmin. Make sure not to overwrite any file there by the same name. If there is already a file named gmapprom.img, make a backup (copy) of it and keep it in a safe place.