Thread: Garmin DriveAssist 50 LM crashes and reboots at specific GPS locations

I'm now suspecting there is a minor hardware fault. Likely the BT controller is failing and if so there is no software solution. It may not worsen, or the problem may eventually progress to other more essential parts of the chip resulting in a total failure.

@Butters and @Boki_Srb, an update on my ongoing problem

I tried loading a copy of the latest map (MENA 2022.2) onto another area of the device filesystem using MapInstall. Whilst it did copy across to both internal memory and sdcard, I was unable get this to show on the device (under MyMaps) and therefore, unable to select for use.

I had an older 2019 Middle East and North Africa map downloaded and was able to select this and extract only the area I wanted (UAE) using MapInstall. On the device (MyMaps), I was able to select this newly extracted map whilst deselecting the main maps (2022.2 MENA and 2022.2 FourSquare) from active use.

On day one, I left Bluetooth disabled and had no problems whatsoever.

On day two, I enabled Bluetooth and have been driving for two days now with no crashes or any problems.

Overall, this workaround seems to be reliable, suggesting this is a memory related problem.

I have a couple of questions and hoping you can advise.

1. The main maps don’t appear in the ‘visible’ filesystem and there appears to be no method of downgrading these to an earlier revision using MapInstall, or Garmin Express. Is it possible to rename these files with an alternative suffix (.old) so they continue to occupy the defective memory, whilst allowing me to have the latest map in a separate area?

2. Is there a reason why there are two maps MENA and Foursquare?

Many thanks again for your continued support.

@mmain
I recall you have a US/EU HWID device. Can you please explain some more about the above:

• Does this device have (i) a factory localized factory-loaded LM subscription for Middle East, or elsewhere and if so where?; If it's not MENA LM, then: (ii) are you purchasing 'one-off' official local MENA mapping data from Garmin direct/Authorised reseller; or (iii) are you loading 'unofficial' (i.e. unlocked) maps for UAE?
• How and where did you load any maps and what naming is being used for working and non-working IMG files? (i.e. give the full paths, e.g. "sd:/Garmin/gmapsupp.img"; "device:/Map/<any_name>.img"; etc..) and identify whether each was loaded directly as an already compiled IMG via GarminExpress or made by you using MapInstall from PC data (.GMAP folder). Indenifty clearly in each individual case the source and type of the mapping data used (official LM, purchased, unlocked and compiled with MapInstall or direct load by self etc., etc..).

Be as clear and concise as possible please as i'm now thinking this might be map data related.

Running multiples of the same map data in different versions is never a good idea even if only one is selected in 'My Maps'/'Map Info'.

Is it possible you have mis-matched versions of maps and supporting files like Foursquare? I'd remove all detail maps and their supporting files from device (don't remove basemap, tz map though), disconnect from PC to re-boot it (so it re-creates a new GarminDevice.xml file) and then connect it to Garmin Express without a microSD card inserted to reload current maps and files as offered only to the internal memory.

PS: Backup everything first of course!

@Butters noted, but I don't see any of the main maps or their associated files anywhere in the internal memory directory structure, are these files hidden somewhere?

Do this:

Spoiler: Image

[Only registered and activated users can see links. ]

Device Manager>File Explorer Options>View.