First question:
While i'm trying to assign an item that can be crafted via certain entity i got this message Difficulty normal: Value must be a string in property tree at ROOT
now i don't know if i misunderstood that message,but according to the recipe prototype page normal and expensive seem optional to put as a code?
even though i put them both i still got the same message.am i missing something here?
Second question:
is there a way to tell Factorio in lua that specific item can be crafted in that specific entity?
an example:can i tell Factorio that iron plate can be smelted using only stone furnace and not electric furnace?
Third question:
While i'm making category i've decided to remove any vanilla categories as well,but i don't know how to do so;i was searching for similar mods that achieved the same idea,i used the code but it seems that just added the category that i wanted but not removed every vanilla category in the process,so how to do that?
Thanks in advance
