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On switching on my Garmin Nuvi 205W- Notice comes up -" CAN@T UNLOCK MAPS" . Press OK. and it reads -" NO DETAILED MAPS FOUND THAT SUPPORT ROUTING. THE NUVI CANNOT BE USED WITHOUT THEM ". PLEASE advise me as to how to UNLOCK my Maps and get ths "Wonderful Device" working again. Thank you , Hugh.

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Have you recently loaded new maps or supplemental maps? If so there is a file you have to delete to recover access.

If your Nüvi keep displaying the maps are locked, you will need to erase a file from the units memory. Connect your GPS system to your computer; go to start then ‘My Computer’, and double click on your device file (mass storage system), there you will see a folder named ‘Garmin’.
In this folder are several different files, look for file named gmapsupp.img. Right hand click on this file and delete as this file is causing the maps to lock.

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Posted on Oct 08, 2009


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1 Answer

My gps says "no

Question: What should I do if my Garmin nuvi or zumo displays the message "No Detailed Maps Found That Support Routing" or "No Map Data Available?"
--> Answer: The "No Detailed Maps Found That Support Routing" or "No Map Data Available" message may appear on your device for the following reasons:
  • The GPS device is missing it's unlock code
  • The maps on the GPS device have been disabled
To determine the cause of the message, touch the screen until the message "No Detailed Maps Found That Support Routing" disappears.
  • If you see a "Can't Unlock Maps" message following this error, remove any microSD / SD cards in the device and follow the instructions below for Retrieving your unlock codes followed by the instructions for Creating an unlock file
  • If you do not get the Can't Unlock Maps message then skip to the instructions for Enabling maps on the GPS device
Retrieving your unlock codes:
  1. Log into your myGarmin account
  2. Select Manage Maps
  3. Select Details
  4. The unlock code is located under the Installed Maps.

Nov 16, 2010 | Garmin Nuvi 360 Bilingual GPS Navigator...

1 Answer

My garmin nuvi 200 it say no detailed maps

my garmin 200 nuvi say no detailed maps found that support routing

May 21, 2010 | Garmin nuvi 200 Car GPS Receiver

1 Answer

Keep getting

It means that your unlock file for you map has either been corrupted or deleted. The file needs to be restored. Please see this link for more information:

- Jim

Aug 11, 2009 | Garmin nuvi 205W GPS Receiver

1 Answer

Garmin Nuvi ~ No detailed maps found that support routing.

Please see this link for more inforamtion on this problem. I can help you resolve the issue. Your map unlock code is either corrupted or missing.

- Jim

Jul 11, 2009 | Garmin nuvi® 200 Car GPS Receiver

2 Answers


I had the same issue..what a pain in the ****.
I came up with a solution that worked for me.
After the update i deleted gmapprom.img and then created my own map using the garmin MapInstall program. start>programs>garmin>mapinstall

Apr 11, 2009 | Garmin nuvi 200W GPS Receiver

1 Answer

Error message appeared and can not do anything with it now

Here is the the lastest response:

Thank you for contacting Garmin International.

If you updated your nuvi 200, 200w, 205, or 205w to City Navigator North America NT 2010.10 between 4/7/09 and 4/25/09, and your unit is display the message, "No detailed maps found that support routing. The nuvi cannot be used without them." or "Can't unlock maps." A new revision of the 2010.10 update file (Garmin_RMU_CNNANT2010C.exe) has been released which corrects this issue. To download this new revision, please follow these steps:

1. Log into your myGarmin account
2. Click Manage Maps and Downloads
3. Connect the nuvi to your computer
4. Click Download Again next to your nuvi
5. Click Launch Download Manager
6. Follow the prompts to install the Download manager
7. Save the file to your Desktop

The new download may take a few hours to download. Once the file has fully downloaded, double click the file to run it, and follow the onscreen prompts to begin the installation again. You will now be able to choose the appropriate region for your device.

Note: Please make sure to only select the region that originally came loaded to your device. For example, if you have a nuvi 200 that came with the Lower 49 States, select that region and not a region that includes Canada.

With Best Regards,

Mark S
Senior Product Support Specialist
Automotive Team
Garmin International

Dec 01, 2008 | Garmin nuvi 205W GPS Receiver

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