'Split' maps installed on device and Basecamp

[Twinforme]

I'm a reasonably proficient user of basecamp but I have experienced an issue recently. I updated Basecamp (Mac) from 4.6.3 to 4.7.0 and also updated the maps to City Navigator Europe NTU 2019.2.

There were two versions of the maps installed on the Unit and three versions on my computer, one seems to cover Eastern Europe and the other Western Europe. This caused me a big issue when travelling from UK through France (one side of the map) to Germany and Italy (other side of the map). Each map only has detailed roads on one side, the other side is basic towns. Each version also 'compresses' the 'wrong' map making it narrow.

When I make a route in Basecamp on the computer (with the detailed map) it works fine but when I transfer to my unit it makes a crazy route with straight lines, i.e. not following roads.

All the Navigation settings are identical on both.

I read that reverting to version 4.6.3 might resolve this but it has not.

I am using Mac software Yosemite 10.10.5

I've included screen shots to show the difference when I switch between the 2 installed versions of the maps on my device.

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Is the best thing to uninstall everything, delete the device off Garmin express and start again.

Ideally I'd like to delete the maps on both Basecamp and the Device and reinstall them again.

Annoyingly I lost a lot of old motorbiking routes I'd plotted when I reverted my basecamp version, is there a way to save these before I start (I can probably find them again from emails etc if necessary)

[Twinforme]

Also just looking through the device files I came across this file. Might this be the issue?
I didn't want to delete it before asking...


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[x-trail]

Europe's map on a Garmin device is divided to All North and All South part.
D6210070A.img is All South map, so do NOT delete it.

From your screenshots the upper 2019.20 map on your device list is All North and the lower is All South.
Those are not two "versions" of the map but two parts of the full Europe map, complementary to each other.
Those two maps also appear on the pull down list "Currently Dispalyed Map" plus a third one, the one installed on your computer. This map is the full Europe map and you must always plan your trips on this map when using Basecamp.
So you don't have 5 maps but 2 partial maps of Europe on your device list on the left and again those 2 partial maps plus the full map of Europe (installed on your Mac) on the list on the right. The problem is that Basecamp doesn't show All South or All North or All Europe in the map's name.
If you planned a trip on Basecamp using the the full Europe map installed on your Mac and this trip is using both partial maps on your device, you must have both of them active (checked) on your device before you connect your device to your Mac, so the route is correctly calculated when your device will start. On my nuvi, when only 1 Europe partial map is selected, the calculation of such a route never ends. On your Zumo maybe it is finally calculated but with straight lines.
Another common problem that depends on each device "route" memory is how long is your trip. If your trip for example is longer than 1500 km then maybe you'll get a straight line near the destination of your route, because your device has not enough memory to calculate the last part in detail. As soon as you start driving along this route and you come closer to the straight line part, it is going to be calculated in detail because some "route" memory is now available.

[Twinforme]

Thanks for the reply.

So if the D6210070A is South, shouldn't I also have a similar file for North?

On my Basecamp I only have one version of the Europe map 2019.2 (see screen shot) plus Global, 2016 and 2018 maps,

Why is this splitting into two on the device? It didn't used to do this.

This means I can't ensure the route I plot is using the same version is on both computer and device

I presume the device is hen reading the wrong version of the map when it plots the route?

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[x-trail]

So if the D6210070A is South, shouldn't I also have a similar file for North?

Yes, in a both "hidden" and "protected operating system files" folder named .System (in windows you have to un-hide both options in order to view this folder). Inside the folder is a file named Gmapprom.img and this is Europe All North map.

On my Basecamp I only have one version of the Europe map 2019.2 (see screen shot) plus Global, 2016 and 2018 maps

Yes you have one "Europe map 2019.2" and this is the map that GarminExpress installed on your Mac. BUT when you connect your Zumo to Basecamp, the program reads and imports the 2 partial maps from Zumo, both - unfortunately- named -again- "Europe map 2019.2". When you click the "Currently Displayed Map" pull down list, that list now shows 3 "Europe map 2019.2" maps available!!!
There is no difference between their names, so in order to choose the correct map ("Europe map 2019.2" installed on Mac) you have to zoom out, try each one and see which of the 3 maps covers all of Europe. Only this map should be used to plan trips across Europe at all times.

Why is this splitting into two on the device? It didn't used to do this.

Because both all Garmin devices internal memory and microSD cards are formatted to FAT32 and it has a file size limt up to 4GB.
Since the size of the European map is constantly growing and already have reached that limit, Garmin has split the map

This means I can't ensure the route I plot is using the same version is on both computer and device

Yes and no!!!
Yes, because when you create a route in Basecamp, the created .gpx file contains hunderds of Via Points that you don't see (created automatically by Basecamp) that instruct your device to follow the roads and junctions same as in Basecamp. But the map you used in Basecamp to create the route must have been already selected in the device prior to its connection to the computer. That means that if you plan a route with "Europe map 2019.2" (GE installed on Mac) you have to prior selected the 2 "Europe map 2019.2" on the Zumo. If you used "Europe map 2016.2" map in Basecamp and you have "Europe map 2019.2" in Zumo, then the results can be different in Zumo.
No, because when you open this route in Zumo, the route is recalculated according to Basecamp's Via Points and Zumo's routing software and options. So there is a possibility of slight changes in the final route in Zumo.
The only thing you can do to make sure that you will pass through certain points, junctions or cities on a long trip across Europe is to mark those places as Waypoints and include them in your route in Basecamp as "your" Via Pionts. This way, whatever happens with Zumo's route recalculation, you will definitely pass from those places.

EDIT I don't really understand you question. Above i've answered to "how sure I am that the route in Basecamp is exactly the same as the route I'm seeing on Zumo".
If the question is "how can I be sure that I use the exact same map to create a route in Basecamp and plot it on Zumo" then the answer is simple.
In Basecamp select the same map that you select on Zumo. In the case of map of Europe, you select full "Europe map 2019.2" in Basecamp and both South and North "Europe map 2019.2" on Zumo Now the map in Basecamp and on Zumo are exactly the same!

I presume the device is hen reading the wrong version of the map when it plots the route?

IMHO I think that straight lines in Zumo mean that you haven't selected both of the 2 "Europe map 2019.2" in Zumo or you have selected another map in Zumo that doesn't have the "road info" that the route has. Even if you planned a route in Basecamp using "Europe map 2018.2" or "Europe map 2016.2" some similar road info exist in "Europe map 2019.2" map in Zumo and the route should be plotted "on roads".
You can check it by yourself if you export your created route to your computer and then open this .gpx file with a text editor. If you see hundrerds of coordinates, those are Basecamp's Via Points and so the route is "on roads". If you see only very few, then the route is a straight lines.

[Twinforme]

I just tried to delete the files from the Garmin and reinstall them but it's the same issue. The previous versions of the maps work perfectly! (see pics)

Also having deleted the 2019.2 map from my computer I'm also unable to instal them again, I just get an error message?

Should I try and update Basecamp back to 4.7.0.0?
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