Satisfactory Modding•3w ago

Saves cannot be loaded after 1 session playing with mods.

Yesterday, I installed a handful of mods and continued a previously unmodded save. Everything ran fine, I hosted a game on Steam and one of my friends joined and was able to play just fine. Today, I am unable to load any of the saves from yesterday. After clicking "continue" or loading a save from yesterday, Satisfactory tries to load the save, but hard crashes while loading, with a Unity bug report generated. I tried loading without any mods, and the same behavior occurs. List of mods below, and debug log Mod Name Mod Reference Version All Fluids are Gasses allFluidsAreGasses 3.1.0 First Person Vehicles FirstPersonVehicles 1.6.1 Mass Upgrade MassUpgrade 1.2.12 Race Timer RaceTimer 2.1.0 Save files from 2+ days ago load up just fine. Steam files have been verified. I tried to go into the Satisfactory Calculator save editor to remove the Mass Upgrade tool, as there's one in my hand and one in the dimensional depot. I couldn't figure out how to delete items from those locations.
Any suggestions on what I can do to at least get the save working? Not the end of the world if I have to go back to playing unmodded. Thanks!

SMMDebug-2025-11-04-...

Solution:

your options are to load a save from before you used Mass Upgrade or to use SCIM to to try to track down the specific belt connection in the world that is broken

Jump to solution

8 Replies

FICSIT-Fred•3w ago

SMM Version: 3.0.3
SML Version: 3.11.3
Installed Mods: 10
Game: WindowsClient CL 433351 from steam
Path: `c:\Program Files (x86)\Steam\steamapps\common\Satisfactory`
Command Line: cmd /C start  steam://rungameid/526870-NO_EOS_OVERLAY

SMM Version: 3.0.3
SML Version: 3.11.3
Installed Mods: 10
Game: WindowsClient CL 433351 from steam
Path: `c:\Program Files (x86)\Steam\steamapps\common\Satisfactory`
Command Line: cmd /C start  steam://rungameid/526870-NO_EOS_OVERLAY

-# Responding to Key Details for SMMDebug-2025-11-04-02-29-31.zip triggered by @GingerOfOz

Robb•3w ago

>mod Mass Upgrade

FICSIT-Fred•3w ago

Fred Mod Search™

Mass Upgrade

Mass upgrade/downgrade your belts and pipes EA: :warning: Note: A base-game bug previously broke this mod, but since it has been fixed, it seems to be working again. Use with caution and please report back on the Discord: https://discord.com/channels/555424930502541343/1384356109778813009 EXP: :warning: Note: A base-game bug previously broke this mod, but since it has been fixed, it seems to be working again. Use with caution and please report back on the Discord: https://discord.com/channels/555424930502541343/1384356109778813009 Last Updated <t:1749962706:R> Created by MarcioHuser

If this isn't the mod you were looking for, try a different spelling.

Robb•3w ago

it appears you have been hit with the mass upgrade mod not working problem it created an invalid belt state in your world, that can persist even when the mod is removed

Solution

Robb•3w ago

your options are to load a save from before you used Mass Upgrade or to use SCIM to to try to track down the specific belt connection in the world that is broken

GingerOfOzOP•3w ago

Gotcha. Is there a good way to spot where the invalid belt is in SCIM? Appreciate the response!

Robb•3w ago

not really, the fastest way is to (obviously in a backup of your save) delete half your map at a time in batches, trying to load it each time to narrow down where it is. every time you can load in, it means the portion you removed contains the bad connection

GingerOfOzOP•3w ago

Got it, thank you!

Gaming

Programming

Saves cannot be loaded after 1 session playing with mods.

Did you find this page helpful?