General bug calculates
There are quite a few calculation bugs; the software struggles with simple addition or subtraction. The image provided shows the type of calculation bug. It was just performing a simple addition, and after a while, the software crashed and refused to perform any further calculations; it was too much for it.
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Comments2
satisfactorymodeler
Nov 25, 2025
Yes, of course this is well know I have been working on this problem for years and it is a very hard problem to solve for the general case. I already opened a ticket so people did not make duplicates. I suggest using the modeler in a more abstract manner with just one building per recipe and let it tell you how many you need. You can also switch the calculator to manual mode which always computes quickly but you need to manually enter numbers to define the splitter and merger ratios.
Frabble
Nov 26, 2025
I've done some tests using the model shown and it appears than specific mismatched settings can determine whether a calculation succeeds or "loops".
The issue reported has each miner defined for 1200 parts per minute. If one is unset then the calculation is immediate : 1200 iron ore calculates 1920 limestone required, 1200 limestone calculates 750 iron ore required.
Test results:
For iron ore set 1200, different limestone settings:
less than 1200 : calculation immediate using limestone setting
1200 - 1919 : calculation issue
1920 : calculation match
greater than 1920 : calculation immediate using ore setting
For limestone set to 1200, different iron ore settings:
less than 750 : calculation immediate using ore settings
750 : calculation match
751 - 1200 : calculation issue
greater than 1200 : calculation immediate using limestone setting.