Why your Nuvi says "can't unlock maps"

 

So you spent the past three hours downloading the new garmin_rmu_cnnant2010_40 map update. Everything goes well and you receive a maps successfully loaded massage.

You disconnect your Nuvi from your computer, watch it boot up, only to see "can't unlock maps". Your first thought? WTF.

Well, here's what happened. Each new map set has its own Unlock Code. My Unlock Code is a string of twenty-five letters and numbers. Your 2010_30 Unlock Code won't work for your 2010_40. Well, Garmin play little joke.

Your "Manage Maps" page at garmin.com contains a listing of ALL your Unlock Codes. The map update process grabs the first Unlock Code it comes to. In my case, it grabbed the Unlock Code for 2010_30, which didn't work for my 2010_40 maps. Haha! I could almost hear the two billionaire owners of Garmin laughing from their homes in the Cayman Islands.

Instead of fixing their update software to find the correct Unlock Code, Garmin provides the fix in the "How do I correct the message "Can't unlock maps," thread at http://www.garmin.com/garmin/cms/site/us/lang/en/searchsuppo...

Summary: Basically, you need to replace the gmapprom.unl file inside your Nuvi at H:\Garmin with one containing the correct Unlock Code.

Steps provided by Garmin to correct the problem:

  1. Log into your my Garming account
  2. Look for myMaps
  3. Click on Manage Maps and Downloads
  4. The myMaps page will list all of your registered GPS units
  5. Below the appropriate device, select the "Details" link
  6. Look for the Unlock Code listed on this page at the bottom (The Unlock Code is different from the Product Key)
  7. Copy all the unlock codes for your device
  8. Close your internet browser
  9. Right click on your desktop
  10. Click new, and then click Text Document
  11. Click on the newly created Text Document icon from the desktop
  12. Type your unlock codes into the document (VinceCANuvi comment - I only needed one. But if you need two unlock codes, they likely go on separate lines rather than be next to each otherin the document)
  13. Click File and Save as
  14. Change the file name to gmapprom.unl
  15. Change the “Save as type” to "All files"
  16. Close the document
  17. You should see the file gmapprom.unl on your desktop
  18. Right click on the gmapprom.unl file and then click copy
  19. Plug your Garmin device in and then click Computer/My Computer
  20. Click on the 'nüvi (drive letter:)'2
  21. Right click on the Garmin folder and click paste
  22. Safely disconnect your Garmin device from the computer
--
Vince Nuvi 350

.

I haven't had that problem with my updates, but thanks for the solution.

--
nüvi 3790T | nüvi 775T | Those who make peaceful revolution impossible, will make violent revolution inevitable ~ JFK

Thanks

Thanks for the explanation

Didn't work.

Thanks for the detail info. But it didn't work for me.

Well ...

It'll only work in certain situations. Perhaps you could explain your exact problem?

--
Where there's a will ... there's a way ... DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

Detail

As noted detail is needed for assistance. To quote Johnny 5 from an old movie, "More input!" grin

--
GPSMAP 76CSx - nüvi 760 - nüvi 200 - GPSMAP 78S

Jeez...

I can't remember the last time I logged in to 'MyGarmin'. It's been years, now.

--
nüvi 3790T | nüvi 775T | Those who make peaceful revolution impossible, will make violent revolution inevitable ~ JFK

Ditto

Juggernaut wrote:

I can't remember the last time I logged in to 'MyGarmin'. It's been years, now.

I think the last time I used myGarmin, it still required the Garmin Communicator plugin/extension and that's quite some time ago.