@damida
It can be for various different reasons: not supported rom, wrong placed Garmin folder, wrong libgarminos , insufficient memory etc
Restart from scratch following post n1 step by step.

Quote Originally Posted by Willia1dak View Post
Using NT map you can try series 1xxx jcv and give us feedback
1xxx series jcv wont work, read post n2, nuvi 40/50 is needed to work.