ID:1754227
 
Keywords: error, map
(See the best response by Nadrew.)
Problem description:

It seems like my map was corrupted somehow and I'm not sure how, just one day I open my DME file and everything was unchecked like the program files and stuff and once I checked off all the things I get this problem while trying to open up a map file.

http://puu.sh/e3nmz/d6a1727e95.png
Best response
You can open the map file in a text-editor like notepad, navigate to the line showing the error and try to figure out what the problem is and correct it manually.