minecraft 1.12.2
mod pack Sevtech ages
Arc furnace

can duplicate ingots

my english is bad, I made a video
https://youtu.be/Yd3ZxU9HuOs

What version of IE is SevTech using?

Please provide a debug crash like requested in the issue template. Next time, read it more carefully.

immcraft-1.12-1.6.0
ImmersiveEngineering-0.12-89
immersivepetroleum-1.12.2-1.1.9
immersivetech-1.12-1.3.10
^all this immersive on mod folder
sorry, no crash, then no debug/log crash

Once again: Read the issue template and contribution guidelines. It tells you how to produce a debug crash.

The latest version of IE for 1.12 is build 92. SevTech is 3 versions behind.
Closed.