Save might be bugged or corrupted

Anything that prevents you from playing the game properly. Do you have issues playing for the game, downloading it or successfully running it on your computer? Let us know here.
Thorkell
Manual Inserter
Manual Inserter
Posts: 1
Joined: Tue Apr 14, 2026 5:09 pm
Contact:

Save might be bugged or corrupted

Post by Thorkell »

Last night when I launched Factorio I recieved a message stating " Opening zip C:/User/(My name)/AppData/Roaming/Factorio/saves/8-8-25.zip failed I/O error" I now cannot open that original file without that message popping up but the autosaves from that world still work. I decided to just continue playing on the autosave file and everything was fine until while I was making some changes on Gleba I noticed that now all of the buildings placed had random qualities. I recently got into the quality mechanics and only had rare and uncommon buildings on my platforms and a few on the different planets. But now I have random epic and legendary buildings throughout my base. Is there any way that I can recover my old save or be able to revert my world to have the buildings it originally did?
px
Attachments
Screenshot 2026-04-14 004443.png
Screenshot 2026-04-14 004443.png (103.94 KiB) Viewed 192 times
Loewchen
Global Moderator
Global Moderator
Posts: 10731
Joined: Wed Jan 07, 2015 5:53 pm
Contact:

Re: Save might be bugged or corrupted

Post by Loewchen »

This is a hardware or os problem.
User avatar
pioruns
Filter Inserter
Filter Inserter
Posts: 298
Joined: Tue Nov 05, 2024 3:38 pm
Contact:

Re: Save might be bugged or corrupted

Post by pioruns »

Since the error happened during I/O operation, I suggest to check Windows Journal, System tab, for I/O errors. Filter for errors, and scroll until you find exact timeframe when it happened.
Also, analyse SMART attributes for your drive, and do SMART Long Test.
Post Reply

Return to “Technical Help”