So you were able to download 18 routes from basecamp to the GPS just fine, but only the last three are giving you trouble on both GPS's? If it's doing the same thing to both GPS's, I would suggest there is something wrong or corrupt in either the route or the route name... does the route name have any special characters? Could the route name be too long for the GPS? just throwing out ideas, when you export from basecamp, try renaming the route/gpx name to something different/simpler/shorter perhaps just to see if that helps.
Only other thing I can think of right now is perhaps the gps has a limit of how many total routes it can hold? I wouldn't think so, but who knows.
Thanks for the suggestions.
I have tried deleting & redoing the maps/routes from scratch.
I have tried renaming. The names are actually shorter than other routes that weren't problematic. For example I have one that loaded successfully named "Mountain Pine Motel to GNP" and an unsuccessful one is "Kalispell to Ogden". Have tried omitting spaces, although the successful ones all have spaces.
I can import the GPX into Base Camp just fine. I can view it on-screen and it is identical to the map used to generate it.
When I click on the track (in the lower left panel in Base Camp) and select 'Create Route from Track' from the menu, it now creates a route that is a straight line, as if my shark could fly. Previously it generated a route that was identical to the track.
I would suspect it to be a Base Camp issue, but I get the same exact behavior on Mac or PC - so the software is different.
I also suspected that the Nuvi 56 perhaps could only hold so many routes. OK, I deleted a couple but still cannot send successfully.
I have tried 2 different KMZ to GPX conversion sites: GPSies and GPSVisualizer. Both have worked previously - that's how I created the other GPX files.
I thought if I just created the route in Base Camp that I could simplify the whole process. You know, create the route & send it to the device. But that flat out doesn't work. From Base Camp I select the route and 'Send to Device'. A dialog comes up and asks if I want to send routes, tracks, waypoints, etc. No matter what I check (or uncheck) it says the transfer is complete.
But, after disconnecting the GPS from the computer & powering on, I get a message on the GPS that "route name" cannot be saved. Just an OK button. And the new route is not on the GPS.
Very frustrating, to say the least. I replaced an older one with the new Nuvi because it was supposed to support routes. Garmin says it supports routes if it has Trip Planner, which this does.
I'm about ready to toss all 3 of my Garmins in the dumpster.