
Fix Long Number Crash
Fixes an engine bug that causes a crash when entering very long numbers in a numeric entry box
Description
When entering very large numbers in a numeric entry box, the game can crash with an integer divide-by-zero exception. This is caused by a bug in Unreal Engine regarding grouping when formatting decimal numbers, and I submitted a PR (https://github.com/EpicGames/UnrealEngine/pull/11663) to fix it. However, Coffee Stain Studios would still need to incorporate this fix into their custom Unreal Engine and ship it in a game update. In the meantime, this mod allows fixing the bug, using a hook to replace the affected code with a fixed copy.
This mod can also be used in the editor. However, building the source code requires manually reconstructing part of it. We have to duplicate about 500 lines of code because we cannot hook the affected function directly (it is static), but the UE license does not allow publishing long fragments of engine code. The comment in `Source/FixLongNumberCrash/Private/FixLongNumberCrash.cpp` contains instructions on how to manually reconstruct the mod's code.
Note: This fix is already included in the editor builds since UE 5.3.2-css-68 (https://github.com/satisfactorymodding/UnrealEngine/commit/17c57b42b34b27e9e05ce93ba7c074b59aa38798), so you do not need to use this mod in the editor anymore.
Versions
How to Install Fix Long Number Crash on Your Server
Order Satisfactory Server
Order a Satisfactory server with at least 4 GB RAM (6 GB recommended). For multiplayer: per 4 players.
Install Mod
Open the mod manager in the dashboard and search for "Fix Long Number Crash". Installation dependencies are installed automatically.
Restart Server
Restart the server so the mod is loaded. Players need to have the mod installed locally as well.
Frequently Asked Questions
Fix Long Number Crash not working after update – what to do?
After a Satisfactory update, mods need to be updated. Check ficsit.app whether Fix Long Number Crash has been updated for the new game version. With Mado Hosting: open the mod manager and click "Update All". If the mod hasn't been updated yet, temporarily remove it so the server starts.
Fix Long Number Crash causing crashes in multiplayer – solution
Most common cause: all players must have exactly the same mod version installed. Check server logs for "ModMismatch" or "Version Conflict". Ensure all players use Fix Long Number Crash v1.2.1 and the same SML. With Mado Hosting, Satisfactory servers run with 6 GB RAM for stable multiplayer performance.
Is Fix Long Number Crash compatible with other Satisfactory mods?
Fix Long Number Crash uses the Satisfactory Mod Loader (SML). Generally, SML-based mods are cross-compatible, but mods modifying the same game systems can cause conflicts. Test new mod combinations on a backup save. The Mado dashboard automatically detects known conflicts and warns you.
Rent Fix Long Number Crash Server
Play Fix Long Number Crash on your own Satisfactory server with mod support.
Mod Information
- Author
- Rex (Th3Fanbus)
- Latest Version
- v1.2.1
- Created
- March 22, 2024
- Last Updated
- July 8, 2026
- Source Code
- GitHub →