Reason: CRC check failed: The zip is corrupted.

This means it was corrupt after the game told the operating system to save it to disk. The only known way for that to happen is failing hardware (RAM, SSD/HDD, or CPU). So in that regard: there's no bug here for us to work on and the topic was put ...

Loewchen wrote: Tue Sep 16, 2025 8:03 pm Can you reproduce the corruption?

I tried, briefly, getting into a spidertron in the previous autosave, and then saving/loading. It loaded fine, so I'm not sure what I did, if anything.

I thought I created this post under Bug Reports. Did I put it in the wrong forum, or was it moved?

Error:
Closing file ~/.factorio/saves/[SpaceAge] - __ 01 - 062.zip/level.dat78 failed.
Reason: CRC check failed: The zip is corrupted..

Overall steps:

Saved my game
Closed Factorio
Put my computer to sleep
Several hours later, woke my computer up
Started Factorio
Attempted to load my save ...