Thanks for the suggestions but despite trying them all it's still not working. I'm sure gmapsupp.img is the correct file name - that's what's used on the version that is working. I also tried leaving the file name as it was (gmapprom.img) with the same result. Something is going on where the GVN 54 is just not seeing the file.....

City Navigator North America NT 2025.10 FID 12328

[Login or Register to remove this advertisement]

GregSp Reviewed by GregSp on . City Navigator North America NT 2025.10 FID 12328 Garmin NT North America 2025.10 maps are out! Link on Mega! https://mega.nz/folder/4xAGlD7Y#pdgK5zPsSrvIUxzVKsM62A Rating: 5