i dont know if this mod is supposed to work with modded entities, but when i tried to use it in a specific area in my pyanodons playthrough it crashed.

The mod Max Rate Calculator (3.4.41) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event MaxRateCalculator::on_player_selected_area (ID 49)
MaxRateCalculator/control.lua:958: attempt to perform arithmetic on field '?' (a nil value)
stack traceback:
MaxRateCalculator/control.lua:958: in function 'calc_assembler'
MaxRateCalculator/control.lua:1181: in function 'calc_production'
MaxRateCalculator/control.lua:1256: in function <MaxRateCalculator/control.lua:1218>

i marked on the map on which selected area it crashed
save: https://www.dropbox.com/s/6ibr3l5cqffvqq1/bug.zip?dl=0

What machines are those? I have only passing familiarity with Pyanadon's

i think they are the same machines what you are familiar about

I've only tested the Fawogae plantation MK1 and the Bioreactor (which IO\'ve tested just now with Max Rate Calculator), so no, I'm not familiar with the machines in your screen shot. If you tell me their names, I can test those.

I've encountered the same issue in Krastorio 2 - it happens when both a mining machine and an assembling machine had the same input. Fixed in 3.4.42

thx