Thread: Nuvi 765t - "Cannot calculate the route." happened after update of FW and/or Maps

Perhaps someone can help me out, too,

I updated my garmin 765T unit. New firmware (v4.50), new Maps (For example Garmin City Navigator Europa NTU Unl*** for 2013, 2014, 2015, 2016 as gmapsupp.img), basemap 501 and removed the old gmapprom.img.

I even tried older firmware versions 3.60 and 3.90.

The problem is, route calculation works until 99%. Then it says "cannot calculate the route."

What I've also done was updating the TMC Messages for Germany. It is really weird. All the necessary files should be in there. I even tried it with a sd-card. Attached you find the current file-structure.

I realized, that when I open the map with my unit, everything works quite slow. Zomming out takes ages. Route calculation is not possible for locations within the same town.

Thank you for your support.