A friend of mine set up a server using the Belt Upgrader mod, as well as https://mods.factorio.com/mod/beltlayer

The Belt Upgrader mod appears to break with the underground belts. When trying to upgrade regular, "above ground" belts, the robots will place them onto the "underground belt" track ...

Downloaded the 0.15 headless a few minutes ago, attempted to start a brand new server with a new save file

This is the result


nasbawks x64 # ./factorio --start-server Shaun.zip
0.000 2017-04-24 11:50:01; Factorio 0.15.0 (build 29027, linux64, headless)
0.000 Operating system: Linux
0.000 ...