Reply from Garmin is given below: not tried it yet
Thank you for contacting Garmin.
TDB_PRODUCTDIR (for iQue 3600)
The TDB_PRODUCTDIR (for iQue 3600)error that is caused by a corruption in the installation of the program. In order to fix this error you will need to remove the entire program and clean the registry of our files. Here are the instructions to fix that issue:
1. Please install the iQue setup CD into the computer.
2. When the menu comes up, please select "Install Software" and then select "Install Detailed Maps".
3. When the installation starts you will proceed until the program asks you if you would like to "Modify, Repair, of Remove". You will select REMOVE.
4. When this process is finished, you will go back to the Setup CD window and select "Install Palm Desktop". You will proceed through to the point where it asks you if you would like to "Modify, Repair, or Remove". You will select REMOVE.
5. In the bottom right hand corner of your computer screen, click on Start, then click on RUN. In the run window, type in REGEDIT and then click OK. This will open the Registry Editor on your screen. Please be aware that the registry is very important to the programs on your computer. Please only delete the files that we instruct you to delete or you could seriously damage your computer.
6. Select the (+) next to the folder stating HKEY_CURRENT_USER
7. In this view select the (+) next to SOFTWARE, when you click on this it will open your registry further.
8. In the SOFTWARE view you will see a series of folders, one will be GARMIN. Highlight the word GARMIN and press the delete key. It will ask for confirmation of deletion. Make sure that the word GARMIN is the only key highlighted. Press on the (-) signs to contract the expansion.
9. Scroll back up to the top of the registry editor and click the (+) sign next to HKEY_LOCAL_MACHINE
10. In this view select the (+) next to SOFTWARE, when you click on this it will open your registry further.
11. In the SOFTWARE view you will see a series of folders, one will be GARMIN. Highlight the word GARMIN and press the delete key. It will ask for confirmation of deletion. Make sure that the word GARMIN is the only key highlighted. (It is possible that this Garmin folder does not exist.)
12. Please shut down your computer and when it restarts, please run the installation from the setup CD again.
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