Garmin Nuvi 42 don't takes unlocked map

Hello,

My first post. I unlocked the City Navigator Europe NT 2017.10 but my Nuvi 42 don't want to show it now. Earlier no problems with unlocked maps. As I read the 42 have no strong "firmware" protection.

I used Garmin unlock for Mac - gimgunlock. No problem in my Dakota 20.

When I change back to my original City Navigator Europe NT 2014.xx no problems.

Nuvi 42 software version 4.00

Any ideas?

/F