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Check Engine

Tells you what's wrong with your modpack in plain English: broken, missing and duplicate mods, plus recipes, loot and quests from mods you don't have.
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Check Engine 0.9.2 (Forge 1.20.1)

File namecheckengine-forge-1.20.1-0.9.2.jar
Uploader
UanmeUanme
Uploaded
Oct 8, 2026
Downloads
22
Size
372.1 KB
Mod Loaders
Forge
File ID
9098451
Type
R
Release
Supported game versions
  • 1.20.1

Curse Maven Snippet

Forge

implementation fg.deobf("curse.maven:check-engine-1730396:9098451")

Learn more about Curse Maven

What's new

- IMPORTANT FIX: in big packs, Check Engine could make another mod crash while the game was starting (seen as "Duplicate client extensions registration for Block{create:belt}" with Create). Please update.
- NEW: Pre-launch check. If your pack can't start, a Check Engine window opens right after you press Play, before the loading screen: what's wrong, what changed, and the fix. Quit closes the game instantly, no more waiting for a 400-mod pack to load just to see the error.
- NEW: "Same crash again" warning when the last launch crashed and nothing changed since.
- Only says "Startup will fail" when the loader's own rules say so. Turn it off with launch_popup=false in checkengine/settings.properties.

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