I've seen quite a few previous posts about which .jcv file to use based upon the map version and unit model, but I haven't come across a general method for determining the correct .jcv file for new map releases. Is there a way to do that? Failing that, my immediate need is to determine which .jcv file to use for CN_NA_NT_2015.40 on a nuvi 660.
Thanks.
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