Troubleshoot DMT Files
Typical DMT Opening Challenges
XMap Isn't There
You encounter an error message such as "%%os%% Can't Open DMT Files" when trying to open your DMT. Usually, this is because you do not have XMap for %%os%% installed. The OS won't know what to do with your DMT file, so double-clicking to load the file doesn't work.
Tip: If you know of another program that can open your DMT file, you can try opening it by selecting the application from the programs listed.
Obsolete Version of XMap
It is possible that your version of XMap isn't able to open your XMap Transfer File file due to incompatibility. Visit the Garmin website to download (or purchase) the latest version of XMap. The primary cause of this problem is that your XMap Transfer File file was created by a different (newer) version of XMap than what's installed.
Tip: You can sometimes get hints about the right program version by right-clicking on the DMT file, selecting "Properties", and looking at the version information.
Regardless, most of the DMT file opening problems relate to not having the right version of XMap installed.
Other Causes of DMT File Opening Problems
Even with the correct version of XMap installed, you can still experience difficulties opening DMTs. There can be external issues inside of %%os%% that are causing these errors when opening DMTs. Additional factors include:
- Corrupt Windows Registry file path references for DMT
- Accidental deletion of the description of the DMT file in the Windows registry
- XMap or another DMT application experienced a flawed installation
- File corruption affecting your DMT file
- Past or present virus infection has affected your DMT
- Hardware related to DMTs has device driver corruption
- Windows has inadequate resources to open your XMap Transfer File file
Quiz: Which file extension is the oldest in existence?
That's Correct!
The text file, or "TXT" for short, is the oldest file extension in existence. Although the exact date is unknown, it is thought to have been invented in the late-1960's.
Close, but not quite...
The text file, or "TXT" for short, is the oldest file extension in existence. Although the exact date is unknown, it is thought to have been invented in the late-1960's.