I installed OSM maps to zumo396. It works on zumo. When i transfer route from basecamp, it says the maps are not installed on zumo... ???
Yes, same map, and I can see the map on the zumo display, follow it, and it's the only one selected. What I can see is that the activity profiles are not working the same on basecamp and zumo. I have the dirt bike selected on basecamp that does not exist on zumo. What I found as a workaround is in basecamp,use task launcher/manage your device/ edit transfer settings/, and disable "Always match route to the map on my device when transfering"
Sorry, you said under your device in BaseCamp you didn't see the OSM map so I assumed that's where you were trying to read it from. However depending on how you installed the map into BaseCamp it and/or your device may think it's a different map. I'd try setting the map on your device so it's visible in BaseCamp using Device Manager and then use that map to see if the error still occurs.