Thanks for taking a look at it! First major issue I've had over years of play.

edit: yep, opened fine in 1.1.12

Was going to continue working on a map, that I had just completed some areas in a few hours ago. When I try to load the map, the progress bar gets about halfway before quitting with this message:

Notice
Corrupt map: trying to load already loaded heat buffer. heat-pipe at {409.5000000000, -212 ...