My bad, it's an error
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According to your code If recipe_subgroup comes back as nil, you get an error because concatenate nil and string is not possible.(Line 2)
If you get an error when loading, send us the error if it pass can you send us the newly named subgroup

Copying with deepcopy copy all the table, there is no ...

local function process_recipe(name, recipe)

if not recipe.results or next(recipe.results) == nil then return end
if ends_with(name,"_rcomb") then return end


local new_recipe=table.deepcopy(recipe)
new_recipe.name=new_recipe.name.."_rcomb"
new_recipe.hide_from_signal_gui = false
new ...

Hello,

Maybe, you can get the tile where the pipe should be placed with surface.get_tile(x,y)
And then determine if you need concrete and/or ice platform

Hello,

This is how logistique group works,
https://factorio.com/blog/post/fff-382

All combinator using the same group are synchronized

Hello there,

I tried to trigger a technology by capturing a spawner.
So I'm using the CaptureSpawnerTechnologyTrigger. In the documentation, I see we can define an entity but even if a define a spawner, capturing any other spawner will trigger the tech
Is that normal ?