Hello & Welcome,

Sorry I didn't see your question earlier.

The "No Detailed Maps Found That Support Routing" message may appear on your device for the following reasons:

• The maps on the GPS device have been disabled
• The GPS device is missing it's unlock code

To determine the cause of the message, touch the screen until the message "No Detailed Maps Found That Support Routing" disappears.

• If you do not get the Can't Unlock Maps message then use the instructions below for Enabling maps on the GPS device

Enabling maps on the GPS device:

• 1. Touch the wrench icon on the Where to/View map screen
• 2. Touch Settings
• 3. Touch Map
• 4. Touch Map Info
• 5. Select the check box next to the maps to be enabled on the device

• 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

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.

Creating an unlock code file for PC:

• 1. Plug your Garmin device into the USB port
• 2. Double-Click on My Computer or Computer located on the desktop
• 3. Right-Click on the Garmin or nuvi drive
• 4. Click Explore
• 5. Double-Click on the Garmin folder
• 6. Right-Click in a blank space in this window
• 7. Move your mouse over the word New
• 8. Select Text Document
• 9. Press Enter / Return on your keyboard
• 10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
• 11. Type the unlock code that is listed in the Manage Maps section of your myGarmin account in all upper-case letters with no spaces
• 12. Select File
• 13. Select Save As
• 14. Change the Save As Type to All Files
• 15. Type gmapprom.unl in all lower-case letters for the File name
• 16. Select Save
• 17. Close the Notepad window
• 18. Delete the New Text Document file
• 19. Disconnect the GPS device from your computer

Creating an unlock code file for Mac:

• 1. Open the TextEdit application located in the Applications folder on the Mac HD
• 2. Click Format
• 3. Select Make Plain Text
• 4. Type in the unlock code that you retrieved from your mygarmin account. The unlock code should be in all capital letters and with no dashes.
• 5. Click Save As and name the file as gmapprom.unl (Note: Be sure to uncheck the box If no extension is provided, use .txt)
• 6. Copy the gmapprom.unl file to the GARMIN folder on your device. (Note: Save the file directly to the Garmin mass-storage device if connected)

*nuvi x70 owners with transatlantic mapping will need to follow the Creating an unlock code file instructions above for their U.S. mapping and then create another unlock file for their European maps:

• 1. Plug your Garmin device into the USB port
• 2. Double-Click on My Computer or Computer located on the desktop
• 3. Right-Click on the Garmin or nuvi drive
• 4. Click Explore
• 5. Double-Click on the Garmin folder
• 6. Right-Click in a blank space in this window
• 7. Move your mouse over the word New
• 8. Select Text Document
• 9. Press Enter / Return on your keyboard
• 10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
• 11. Type the European unlock code that is listed in the Manage Maps section of your myGarmin account. This will need to be typed in all upper-case letters with no spaces
• 12. Select File
• 13. Select Save As
• 14. Change the Save As Type to All Files
• 15. Type gmapprom1.unl in all lower-case letters for the File name
• 16. Select Save
• 17. Close the Notepad window
• 18. Delete the New Text Document file
• 19. Disconnect the GPS device from your computer

If you continue to receive the "No Detailed Maps Found That Support Routing" message after completing these steps please contact Garmin Support.

Please let me know what you find or if you have more questions.

Take Care, Greg A.