You have two folder in your SD card :
1. MAP
2. Garmin / JCV - just file D2504120A.JCV ( this file is cnent - not cnent-u) put in
I am two folder
folder Garmin and Folder JCV
In the folder Garmin is installed map, and the folder JCV, copied JCV file
With old maps so work perfectly.
Older maps mean 2013.10, 2013 20 etc.
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