Message on screen says "can't unlock maps". What should I do?

There several reasons you may receive the message Can't Unlock Maps on your nuvi or zumo device.

• Can you press OK and get to the Where To/View map screen?
• Did you load maps to the unit using the MapSource or MapInstall program?
• Did you load maps to an SD data card?

If one of the points above applies to you, please follow the steps below to clear the Can't Unlock Maps message:

1. Remove SD card from unit, if applicable.
2. Plug the unit into your computer with a compatible USB cable.
3. Open MyComputer/Computer icon. (Mac users skip this step.)
4. Right-Click on the Garmin drive and select Open. (Mac users can locate the Garmin drive mounted on the Desktop.)
5. Open the Garmin folder.1
6. Locate a file named gmapsupp.img
7. Right-Click and delete file named gmapsupp.img
8. Safely disconnect your unit from your computer to see if the Can't Unlock Maps message is gone.

1. Nuvi 1100/1200/1300/1400/1600/3700 and Zumo 665 users will open the Map folder instead.

*If the gmapsupp.img file does not appear in the Garmin folder, please create an unlock file for device.

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.

The "No Detailed Maps Found That Support Routing" 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

To retrieve your unlock codes you must first register your satnav if you haven’t already done so.
To register
· Connect the satnav to your computer.
· Go to www.garmin.com and select your country
· Click on “myGarmin”
· Click on “Register Your Garmin Product” and follow the prompts
You’ll be asked to create a username and password. Write them down and keep them safe as you’ll need them anytime you want to update your maps.
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

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 checkbox next to the maps to be enabled on the device

The "No Detailed Maps Found That Support Routing" 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 at the bottom of this solution
  

To retrieve your unlock codes you must first register your satnav if you haven’t already done so.
To registe;

• · Connect the satnav to your computer.

• · Go to www.garmin.com and select your country

• · Click on “myGarmin”

• · Click on “Register Your Garmin Product” and follow the prompts

You’ll be asked to create a username and password. Write them down and keep them safe as you’ll need them anytime you want to update your maps.
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

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 checkbox next to the maps to be enabled on the device

The "No Detailed Maps Found That Support Routing" 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

To get your unlock codes you must have registered your satnav. If you haven't already done so you can by connecting your satnav to your computer. Go to www.garmin.com Click on myGarmin and then on Register Your Garmin Product. You'll have to create a username and password to register. Note them down and keep them safe as you'll need them anytime you want to update maps.
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)

If you have a second map on your satnav e.g. if USA is your main map and you purchased a map of Europe which you need to unlock also

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

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 checkbox next to the maps to be enabled on the device

The "No Detailed Maps Found That Support Routing" 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.

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

To check that the map has not been disabled. Press Tools, then press Settings, then press Map, then press Map Info and see if your map has a tick to show it's selected. If not press the map name to select it. It should then work.

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} The "No Detailed Maps Found That Support Routing" 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 myMaps
3. Select Manage Maps
4. Select the device from the drop down menu
5. The unlock code is located under the "Maps installed on this device" section

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} The "No Detailed Maps Found That Support Routing" 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 myMaps
3. Select Manage Maps
4. Select the device from the drop down menu
5. The unlock code is located under the "Maps installed on this device" section

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} The "No Detailed Maps Found That Support Routing" message may appear 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 myMaps
3. Select Manage Maps
4. Select the device from the drop down menu
5. The unlock code is located under the "Maps installed on this device" section

Normal 0 false false false MicrosoftInternetExplorer4

/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} 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 checkbox next to the maps to be enabled on the device

This error is caused by a corrupt or missing map unlock code. Please email me @ [email protected] and I will talk you through on how to fix the problem.

- Jim
SHARCNET-USA