I tried many different map version downloads and no luck. I think it is the way Garmin formatted the CF card and placement of map data on particular block locations. This is an old copy protection scheme used back in the early 1980's when the placement of data had to be stored in a certain data block (on a floppy disk) which could not be relocated or the program did not load or work. Like now as an example on a hard drive where you have data blocks that can't be moved during a defrag.
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