Hello!

So, after some thorough troubleshooting, I feel comfortable saying that K2 and this mod are unable to be used together, as long as the micro furnace option is enabled. At least that's what I have to conclude? (Not saying my conclusion is worth much, just trying to help as best I can to help you, I appreciate your hard work)
|Anywho, I'll link screenies of what I've found.

Error loading mod message:
https://i.imgur.com/DZ09QqW.png

Relevant line in func.lua:
https://i.imgur.com/uPfeOaJ.png

Relevant line in data-final-fixes:
https://i.imgur.com/lisrqSq.png

K2, Mini machines and Micro Machines are the only mods I have enabled, and the issue happens even if Mini machines is disabled. Hopefully its an easy fix?

(EDIT: Somehow forgot to read the title ) K2, as in Krastorio 2? If so, I can probably fix that fairly easily. I think I just missed a certain line in the micro furnace code, telling it not to shrink all of the Kras2 furnaces (since they are different sizes). Will look into this tomorrow morning

Oops, yes, I meant to say Krastorio 2.

Thanks for the fast turn around!

Don't worry, you mentioned in the title, I just missed it somehow lol. But Krastorio2 compatibility should be implemented as of v1.0.3