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Try removing from the device the D4935310A.img from the Map folder and the gmapprom.img from .system
Use the clone device SD card freshly updated with Garmin Express and rearrange an rename the gmapprom.img to gmapsupp.img as the image below
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Plug the SD card into your device and see if there are errors.
OK rearranged the SD card and I get the same error. If I don't have the SD card inserted no error.
The D4* files look like they're the FourSquare database. If I click on the "FourSquare" icon in Apps it displays various entries with the SD card inserted but nothing without it. So it seems it is unlocking that fine just not the main map.
I uploaded a garmindevice.xml file. That's a freshly created one. I deleted the original (but backed it up) so it could recreate it in case that helped.
Update. There's a file 844474241.gma in the .System folder with a 2016 date on it. If I delete that the error message changes to "cannot authenticate maps". I've put that file back and now get "cannot unlock maps" again.
Yes, they're uniquely recreated.Quote:
Originally Posted by stevex [Only registered and activated users can see links. Click Here To Register...]
No, that's not it. I've got much older LM devices which are still offered current maps by the Garmin server.Quote:
I am wondering if the unlock algorithm changed in some way that's incompatible with older devices: this one is from 2017.
Garman_Nuvi will examine your uploaded XML file for any irregularities but meanwhile try as i've suggested below if you want.Quote:
If there are any diagnostics or other things I can try let me know. I'm pretty tech savvy but a noob when it comes to Garmin internals ;)
Remove that old GMA file along with the detail map and its associated UNL & GMA and re-connect to GarminExpress again. If you still have the problem without that 844474241.gma, then:Quote:
Originally Posted by stevex [Only registered and activated users can see links. Click Here To Register...]
- Make yet another full backup
- Reformat the internal memory using only [Only registered and activated users can see links. Click Here To Register...] with suggested settings;
- Create a Garmin root folder and connect to GE to get it updated;
- You might have to also add some Voice, Keyboard and Text folders if it won't boot with only a Garmin folder onboard but try first just with a Garmin root folder, without or with an old or empty GarminDevice.xml in it.
PS: Also clear it's non-vol memory after it boots but BEFORE reconnecting to GE. [Only registered and activated users can see links. Click Here To Register...]. Method is the same as for nuvi 2/3xxx detailed in that post.
OK I wiped it and created an empty Garmin folder. It did reboot OK. I cleared nonvol and got prompted for language settings when device restarted.
I then reconnected GE and reinstalled maps. No errors reported.
Device restarts and the same errors and behaviour as before :banghead:
That is says no detail maps then cannot authenticate. Foursquare data visible but no maps as the old low detail map hasn't been copied back.
I'm wondering if the Garmin server is sending back an unlock file that for some reason wont work with my device.
I did check your garmindevice.xml and the are nothing that stands out.
The garmindevice.xml show the UK & ROI installed as the gmapprom.img
You might be onto something with the unlock codes ,I'm just running some tests at the moment...........
OK, it appears the .unl codes Garmin Express is creating for UK & ROI do not have the correct product number of the map,and the Foursquare .img has the correct one.
Spoiler: Image
Check your PM.
I've uploaded Full Europe with unlock files that are valid for your device to put on your SD card
Yes i tend to agree that this device is getting shafted by Garmin's server for some weird reason. The message "Cannot authenticate maps" is related to a missing or inappropriate GMA file. A problem with unlocking is what invokes the "Cannot unlock maps" message. Problem is that we can parse an UNL file with [Only registered and activated users can see links. Click Here To Register...] and even create an unlock code with JetMouse for a detail map to be used on a specific device without GMA in its firmware, but we're unable to read, replicate or spoof GMA files. You can use InfoUC to easily check that the UNL code they've now supplied is for the right map (FID and Product) and for your nuvi 58 (UID). (*See edit below*).
I think it's a fair question to ask Garmin support why the heck they're supplying your device with invalid files. The service desk drones likely won't be able to answer sensibly and will just reach into the box beside them to grab a kitten to strangle instead when you ask for your ticket to be escalated to someone who actually can fix this for you. I know for certain that there are in fact very knowledgeable ppl in Garmin but you'd be lucky to get one first-up answering the support lines and you'd need to be very persistent to get put thru to one.
If you don't wish to inflict the torture on yourself of waiting endlessly on the phone to them, we can copy and then erase the device's nonvol region to see if that clears the problem. Let's know if you want to try that next.
*EDIT: Ah! I see GN has done that for you and it seems the UNL code is indeed invalid. Try recreating the UNL with [Only registered and activated users can see links. Click Here To Register...] and replace the one supplied by GE.
I think eventually he will use my proposal when his patience runs out! :tongue:
You underestimate my patience ;) I may well follow your suggestion at some point when I can understand what it means. Like I said I'm a noob here but doing my best to correct that.Quote:
Originally Posted by janch [Only registered and activated users can see links. Click Here To Register...]
For now the problem has been resolved with those files GN sent me to put on the SD card.
Now I have a bit of a dilemna. My background (before I retired) was in cryptography and I have a history of reverse engineering various things and contributing to open source projects. I can sense there is some serious wizardry going on here and I'm more than a bit curious to know more.
I've also been on the receiving end of such questions from newbies where I was the wizard and I know how irritating they can be when I'm ridiculously busy.
So I can do one of two things here...
1. Be happy that the situation has been resolved and move on.
2. Fall down a rabbit hole and find out everything I can, devote the next X months/years of my life to this.
Dammit option 2 is awfully tempting.
@stevex
Great we got to find the cause ,your device appears to be one of the rare Travel Edition models, I've only seen these in the Drive range and out of the Middle East. I believe you will be able to to update your nuvi 58 with the exception of UK & ROI with any of the Regions/Countries that your nuvi 58 has a subscription.
even Full Europe or North America with the aid of an SD card as the updates are large.
Spoiler: Image
My guess is the Travel Edition fell though the cracks when Garmin updated regional maps for free to Full Europe.
My Travel Edition Drive 50 has the same issue with the FID being incorrect for the 2 regional options UK & ROI and Southern Europe
Spoiler: Drive 50 Travel Edition
Code:https://support.garmin.com/en-gb/?faq=JkPEUtYUF91VrNEPsreYN7
It was purchased from Aldi in the UK I think about 10years ago as one of their "special buys". It says rather too much about me that I still have the box:
Spoiler: Box