If a building requires a placeable item (eg. heat pipes in the heat exchanger recipe) that happen to have multiple recipes, then it autofills the recipe for the intermediary based on internal logic. The problem is that there's no manual override for this, so if the recipe it selects is less than ideal (eg. it wants a material I don't have access to), then you have to fight against the mod to get your stuff placed down. I'd imagine it would be fairly simple to connect that part of the code to the prioritize/blacklist system that already exists, but I have no way to know tbh, I don't code..

I just realized that heat exchangers don't actually require heat pipes lmao. Pretend I said heating tower.

Yeah, it shouldn't be too complicated to add a button that recalculates recipes based on selected priorities. I'll look into it.

Added.

thx

I can't find the recalculate button. Am I blind?

It's in preferences where you select priority for duplicate recipes.

I can see the duplicates manager window, but I can't see any kind of update button there. Changing my preferences in the list itself also doesn't make my green belts stop wanting plastic.

okay I think I figured out what's going on: I'm on version 2.5.15 which apparently isn't the current version. Idk why I can't find the update tho

Update: I figured it out I was on the wrong game version lmao

and now I'm getting this:
Error while applying migration: Quantum Fabricator: 2.6.1.lua

LuaEntity doesn't contain key entity.
stack traceback:
[C]: in function 'index'
-_quantum-fabricator/migrations/2.6.1.lua:5: in main chunk

Please upload your save somewhere, this is something weird.

I'm not sure how to do that

I was messing around in the files to try and force-download the newest version. Could that have anything to do with it?

I think I got it. Stupid spaghetti bug.

Try updating to the most recent version now.

You're a legend. This newest update seems to be breaking a lot of different mods :/