Trying to use custom maps generated with gpsmapper and sendmap in the new 2015 marine chart platters. The custom maps are on sd card with a lock key based on the unit ID number. When I plug in the chip, the unit recognizes the map but a message stating " THE MAP FORMAT IS NOT SUPPORTED" is displayed on screen. Below is the data from the GarminDevice.xml file. Anyone run into this problem. Have used this method for the past several years without any problems.


-<Model>
<PartNumber>006-B2101-00</PartNumber>
<SoftwareVersion>230</SoftwareVersion>
<Description>echoMAP 74sv, US Offshore</Description>