Automatically upgrade buildings by hand or with construction robots.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Error while running the event handler: upgrade-planner/control.lua:44: attempt to index field '?' (a nil value)
Try using the latest version of the mod and Factorio and let us know if you still get the error.
if on Steam: it seems that the v13 Update is not comming with the normal update Settings, it seems that you need to opt-in to the beta builds for 13.x http://puu.sh/qj6eG/030a40f52b.jpg
I got the error at launch "no loader found for selection tool found"
This fixed the problem!!!! thx
