The nickel enrichment process in If I Had A Nickel can't use red productivity modules in the chemical plant when the inputs are rotated.

https://mods.factorio.com/mod/IfNickel

I have a bunch of other mods but the base is K2SEvBZ.

Thanks for the handy mod!

I've tried with K2SE with IfNickel and I was unable to reproduce.
When you hover over the recipe, it tells you which mods modified the recipe, could you give me the modlist that modified it?

The original recipe is modified by: If I Had A Nickel > Space Exploration

If the chemical plant itself may affect things, it is modified by: Base Mod > Space Exploration > Natural Gas > Space Exploration > AAI Industry > Combat Mechanics Overhaul > Space Exploration > Bottleneck Lite > Brim Stuff

I've tried again with those mods, but I was still able to add productivity module. Just to be sure, you are using Fluid Permutation Fixed, right? Instead of Fluid Permutation, because the last has this bug.

Below is the link showing the recipe being used on an chemical plant, is it the one you can't add productivity module?

Yep, can confirm it is the current version of Fluid Permutations Fixed, and using the standard Chemical Plant as you have pictured.

I went back and enabled only the relevant mods and, like for you, the bug was not present and productivity modules worked.

Going through my mod list one-by-one, I found that the bug appeared after enabling any one of the following:

• Brass Tacks by Planetfall
• BZ Foundry
• BZ Lead
• BZ Graphite & Diamonds
• BZ Manganese
• BZ Noble Metals
• BZ Tin
• BZ Tungsten

Only one of those needs to be enabled for the bug to appear. The other mods from Brevven and Planetfall do not cause issue (Titanium, Zirconium, Them Thar Hills, Lasing Around, etc.). Let me know if any other info might help.

Fixed. Sorry for the delay. I should be looking for productivity module changelog instead. And with those mods, they are changed a lot. If there are any other issue, you can talk to me.

Wow! Just updated and it works great, thanks!

I am sure there are many little things that need to be accounted for when making mods work with all these others. It is impressive what all you folks do to enhance the game. No apologies necessary, that was amazingly fast.