@axxxtw
Post #1 gives the choice of 2 CXs to download, Full CX [standalone, including required CNNT map data] and Small CX [MMR only, no CNNT map data so it relies on the CNNT 2014.10 map also being on the device and selected]:
FullCXNA-2014.10 (FID 800) Standalone version
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SmallCXNA-2014.10 To use this file you must have CNNA NT 2014.10 in your nuvi
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Have a read of Post 8 as well to further explain, but in a nutshell: if you use the small CX 2014.10, you should team it only with CN 2014.10; if you use the full CX 2014.10 you must deselect your CN if it's any version other than 2014.10.