Game sometimes crashing from opening train UI's

The game keeps crashing when I repeatedly open train platforms and I don't know why.
My mods aren't outdated.

SMMDebug-2025-01-02-16-24-13.zip512.68KB

__skept1cal_The game keeps crashing when I repeatedly open train platforms and I don't know ...

FICSIT-Fred•1/2/25, 4:25 PM

SMM Version: 3.0.3
SML Version: 3.9.0
Installed Mods: 7
Game: WindowsClient CL 385279 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: 3.9.0
Installed Mods: 7
Game: WindowsClient CL 385279 from steam
Path: `c:\Program Files (x86)\Steam\steamapps\common\Satisfactory`
Command Line: cmd /C start  steam://rungameid/526870-NO_EOS_OVERLAY

_skept1cal_OP•1/5/25, 2:36 PM

message.txt8.21KB

_skept1cal_OP•1/5/25, 2:37 PM

What's this

__skept1cal_Click to see attachment

Robb•1/7/25, 5:52 PM

>maxuobjects

__skept1cal_Click to see attachment

FICSIT-Fred•1/7/25, 5:52 PM

Crash reason in the logs

Assertion failed: Index >= 0 && Index < MaxElements [File:C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\CoreUObject\Public\UObject\UObjectArray.h] [Line: 388]

### Why the game crashed
You've hit the UObject limit. Unreal Engine has a large, fixed-size array to manage all UObjects at runtime (it's used for fancy things like "reference counting" and "garbage collection"). In pre-U8 this was very unusual and only happened when people made ridiculously titanic factories. However, it seems U8 has bugs that make hitting this limit substantially more likely, even when not building megafactories.

Details

In U8, something seems to be "leaking" UObjects, i.e. the UObject array gets fuller and fuller over time in spite of the garbage collector's best efforts. This crash happens randomly, but the probability of crashing increases the longer the game has been running for. Crashes are more likely to happen when opening UIs (the UI system uses UObjects to function), especially UIs that show many-slot inventories e.g. player, storage containers (the number of allocated UObjects is proportional to the number of inventory slots). Consequently, having many additional inventory slots increases the probability of crashing.

How to fix

Coffee Stain Studios (the ones who made Satisfactory) will fix this in 1.0. Until then, consider these options:

Install https://ficsit.app/mod/Th3UObjectCounter, which warns you when the UObject array is near full, so you can restart the game before it crashes.
Remove mods that add inventory slots and use https://ficsit.app/mod/DecreaseInventorySlot to reset your slot count to normal
Instead of inventory slot mods, use mods that allow larger stack sizes (like https://ficsit.app/mod/StackOverload) or deliver items to you as needed like https://ficsit.app/mod/LogisticModules

Robb•1/7/25, 5:52 PM

not the exact message you got but something similar

Robb•1/7/25, 5:53 PM

are you using modded train platforms with more slots? that would make this issue happen more quickly

RRobb are you using modded train platforms with more slots? that would make this issue...

Rex•1/7/25, 6:05 PM

Given that

UFGInteractWidget::OnCustomTick

UFGInteractWidget::OnCustomTick

is in the stacktrace, it is likely

RRex Given that `UFGInteractWidget::OnCustomTick` is in the stacktrace, it is likely

_skept1cal_OP•1/8/25, 7:01 AM

I don't

_skept1cal_OP•1/8/25, 7:01 AM

I have extra inventory slots

Rex•1/8/25, 8:21 AM

How many extra inventory slots?

Rex•1/8/25, 8:21 AM

Lots of extra inventory slots would make the issue even more likely tbh

Rex•1/8/25, 8:22 AM

Because any UI that shows the player inventory will create a lot of UObjects

RRex How many extra inventory slots?

_skept1cal_OP•1/8/25, 7:46 PM

300

SMM Version: 3.0.3 SML Version: 3.9.0 Installed Mods: 7 Game: WindowsClient CL 385279 from steam Path: `c:\Program Files (x86)\Steam\steamapps\common\Satisfactory` Command Line: cmd /C start steam://rungameid/526870-NO_EOS_OVERLAY

Game sometimes crashing from opening train UI's

Crash reason in the logs

Details

How to fix

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Crash reason in the logs

Details

How to fix