Found the solution here: http://steamcommunity.com/app/455130/discussions/0/350543319569067478/

Whenever I load up the Black Ops 3 Mod Tools Launcher I get this:

[code]D:\Games\Steam\steamapps\common\Call of Duty Black Ops III\\gdtdb\gdtdb.exe /update

gdtDB: updating

errors found while updating database!

Exception while parsing (d:\games\steam\steama...

When I'm playing this map solo I get around 200-260 fps but when I'm hosting a co-op game with my friend my fps is around 50. Can't tell if it is because of that TM4 or this map. Can anyone help?!