Quote Originally Posted by guyinnrw View Post
the built-in JCV files of CE map are:
D2924140A.jcv (120.059 KB)
D3589130A.jcv (148.411 KB)
I confirm that both JCV files have the same second kind format for use with Nuvi 4x/5x and your Zumo. In fact, D2924140A.JCV is a subset of D3589130A.JCV, so you can safely delete the former.

It is strange that Garmin will put two built-in JCV files in your device. Are you sure D3589130A.JCV is not downloaded from post #1? What are the original date/time of both JCV files?