Well, the only recommendation I can offer is to start fresh using the following steps...
- Reformat the USB stick using FAT32 format
- Download the Dealer Location Update from H-D site to your computer (not the USB drive)
- Unzip the zip file: Harley_POI_Maps
- Open the folder: Harley_POI_Maps
- Copy BOTH the nng folder and swdl disc image file (swdl.iso) to your USB drive
- Turn on your Infotainment system (using Accessory or turning the switch on)
- Once you accept the Warning screen, plug in the USB drive and it will load into your Infortainment system the same as the system update
No other files (e.g. zip file or other folders) should be in the root directory of the USB drive and all the sub-folders and files should remain in the nng folder. The update software is extremely picky on this point! Good luck!