@gpstr
One more feint possibility... although the older jcv file on the unit's internal memory shouldn't cause any conflict problems with the newer file on the sd, try again after removing the older file (backup of course).
EDIT: Same problem by another user with CN Southern Africa 2013.10. Seems like the 40's maybe can only use it's specific jcv file downloaded from garmin with the map.
[Only registered and activated users can see links. Click Here To Register...]. I hope someone will post it for you if that is the case.