Here is a bug that I discovered when I wanted to take down a tree with the Stihl chainsaw, I'm using the Saw dust mod from fcelsa...
It throws this message in loop as long as we don't change hand-tool...
With the three harvester/de-limber Ponsse ScorpionKing, there's no error...Error: Running LUA method 'update'.
D:/Utilisateurs/Max/Documents/My Games/FarmingSimulator2017/mods/FS17_sawdust/sawdust.lua:172: attempt to index field 'particleSystems' (a nil value)
Hope this reaches the author for fixing...