Some simple rules to cut thru confusion when using CX and CN map combinations:

* Don't mix versions: ie CN 2013.10 with CX 2012.40 either small or full. Occasionally some mismatched combinations work, mostly they do not.

* Matching versions will always be OK: ie CN 2012.40 with CX 2012.40 either small or full. No conflicts possible as map info is identical.

* If you must use a CX that does not match your CN, do this: Put the full CX on an sd card and deselect the mismatched CN before using.