Define a challenge on a chosen map and try to complete it as fast as you can, or in a limited time. Publish it on the factorio forum (section Maps and Scenarios) to challenge other players, and see if someone can beat your personal record...
When clicking the furnace or electric pole, and probably more in the Edit menu (havent checked them all), i get this error which throws me out of the game: Error while running the event handler: Challenge/control.lua:1247: Gui element with name chlg_flow_sel_200 already present in the parent element.
Happens on both 13.0 and 13.1
Here's my mod list: http://pastebin.com/7A8NL7sZ
I changed some code around and got an error related to the curved rail item icon. I don't think the curved rail is craftable anymore (https://www.factorio.com/blog/post/fff-113) so that might be the issue.
