I just read another post that says if you have Propane tanks selected in the 770, trips won’t transfer.
hope that helps.
That was also me who wrote this in this other thread. Thanks anyway for bringing it up here - so far I had just been too lazy to post this information in this thread.
By reading more or less by chance a review for the RV 780 on Amazon I found the solution for this problem.
BaseCamp for macOS (and maybe also for Windows) cannot transfer trips to the RV 770 if a propane tank is added to the RV details on the device. This is a bug in BaseCamp that Garmin blissfully ignores since years (and is not even forthcoming in letting its customers know). The propane tank has to be left out of the RV details on an RV 760/770/780 if one wants to use BaseCamp to create trips and then transfer them to the device.
Since taking the propane tank out of the RV details on my RV 770 I have no problems anymore to transfer trips from BaseCamp to the device. I'm very happy about that because I definitely prefer to compose trips in Basecamp on a computer with a larger screen than on the RV 770 directly.
Wow, I have beat my brains out trying to get this to work. That did the trick!! And Garmin support spent a long time with me on this and didn't give me this hint.
This is a very old thread on a very old issue that’s pretty well known even by Garmin, now. Hopefully the Basecamp developers have fixed it by now.
It is still not possible to transfer trips from Basecamp to the RV 770 when a propane tank is added to the RV configuration.
I made it known to Garmin more than two years ago (the back-and-forth email conversation is still on my computer). Since then there have been several updates to Basecamp (the latest version for macOS is 4.8.11) - and this bug has not been fixed or at least "officially" acknowledged.
Since I see where they are not developing BaseCamp any longer and will be steering folks toward Explore (been happening since 2018 though) I wouldn't expect any fixes. But it would have been nice if the tech had that glitch in her/his support script.
What is Explore? Is that a replacement for Basecamp and can be used to create trips for the RV 770? As far as I can see from a quick research Explore is not meant for and cannot be used with Garmin's automotive navigation devices.