Crash Fixes
Why this happens

When an EU4 mod always crashes after a certain number of years, and nothing special is happening at the moment of the crash, it almost always means:

❌ A scripted event, AI routine, or trigger in the mod breaks once the game world becomes complex enough.

Because it:

works on other computers

works in multiplayer

crashes only in singleplayer

crashes after a predictable amount of time

…the mod itself is probably fine.
👉 Your local cache / launcher / mod files are corrupted.

This is extremely common with EU4 mods.

✅ The fix that usually solves this (very important)

Follow these steps exactly and in order.

1️⃣ Hard reset EU4 script & map cache

(This is more effective than reinstalling.)

Close EU4 and Steam

Go to:

Documents\Paradox Interactive\Europa Universalis IV


Delete these folders:

cache
gfx
map
mod


(You can keep save games if you want, but do NOT load old saves later.)

2️⃣ Completely reset the Paradox Launcher

Launcher corruption is one of the biggest causes of delayed crashes.

Press Win + R

Paste:

%appdata%\Paradox Interactive\


Delete:

launcher-v2


Then again Win + R, paste:

%localappdata%\Paradox Interactive\


Delete:

launcher-v2

3️⃣ Reinstall the mod manually (important)

Even if Steam says it’s installed correctly, it may not be.

Unsubscribe from the mod in Steam Workshop

Go to:

Steam\steamapps\workshop\content\236850


Delete the mod’s folder manually

Restart Steam

Subscribe to the mod again

Wait until the download is 100% finished

Start EU4

4️⃣ Force a clean mod load

Create a new playset

Enable only this mod

No UI mods, no compatibility mods

Start a new singleplayer game

❗ Do not load old save files.

Why this works

EU4 compiles:

events

AI behavior

decisions

scripted triggers

…into cache files when the game starts.

If one single file is corrupted, the game may run fine for years and then crash the moment that script is evaluated — which is why it always happens later, not immediately.

Multiplayer often works because:

the host’s cache is clean

your client doesn’t run the broken script locally

If it STILL crashes after this

Then the cause is almost certainly antivirus / Windows Defender blocking a mod script.

Add exclusions for:

Steam\steamapps\common\Europa Universalis IV
Documents\Paradox Interactive\Europa Universalis IV


Then test again.

If you want a precise answer

If you tell me:

the name of the mod

whether it crashes at exactly the same year every time

what’s in Documents\Paradox Interactive\Europa Universalis IV\crashes

…I can usually tell you exactly which event or script is causing it and whether there’s a workaround.