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The zero bytes of the GCD file is the clue indeed as it should have been ~20MB and was probably what was causing the bootloop. The device would have been recognising it as a firmware update file and so endlessly and fruitlessly attempting to process it to re-flash appropriate memory regions.
You may find that you'll need to load the aviation basemap manually as normally Garmin's programs, GarminExpress and WebUpdater, might not offer to replace it. If you need one and can't source it from a reliable backup or elsewhere let me know.
Anyway good result. I'll mark the thread as 'solved'. Safe flying.
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Thread: Garmin Aera 500 gupdate file
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27th March 2024, 10:38 AM #1Garmin/GPS Systems GMod.
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27th March 2024, 11:36 AM #2Junior Member
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Device now works fine, but i have another unexpected issue, before re-formatting a made a copy of aviation data bases, i copy-paste them back and to my surprise device shows message 'cannot unlock databases' any ideas what could cause that? i haven't missed any files from data base folder, it just as it was originally located on the device.
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22nd January 2025, 09:29 PM #3Member
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Hello.
Originally Posted by northarrow
The reason is that the feat_unlk.dat file is missing in the ROOT directory of the AERA 500. If you made a full backup of your navigator files, then copy this file back to the ROOT directory.
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