Follow Up:
I made contact with Hyundai AustrALIA. they say the GD models generally only accept map updates for about 5-7 years after manufacture. This puts mine 2015 model outside that range.
Questions to other GD i30 owners:
1, Has anyone else struck this?
2, what is the latest map that has successfully installed on your nav system please?
3, does anyone know if there is a work-around in the background files to make the head unit accept map updates even after 5-7 years of age?
Thanks in advance.