Datapack Load Error Fix
by dreamforSh
Datapack Load Error Fix is a Forge and NeoForge utility that repairs worlds after mods or datapacks have been removed, cleaning up stale references when a world loads.
What it does
When a world loads, the mod scans level.dat for dimension references and inspects region files for leftover entities and tile data. Every dimension, entity and block entity reference found is checked against the list of installed mods, and any reference pointing at a mod that is missing gets deleted. Any file that is changed is backed up first, and the work runs quietly in the background without adding content or altering gameplay.
Servers do not need it; each player installs it for their own game. It is published for Forge and NeoForge across 22 release versions, 1.18.2 – 1.21.11, and is open source under the MIT License. Detailed logs are available for advanced users who want to see exactly what was removed or modified. The author advises backing up worlds before any repair tool is used, even though the mod makes its own backups.
Key features
Dimension data cleanup
Removes references to dimensions from mods that are no longer installed in the level.dat file.
Entity cleanup
Scans region files and removes entities that belong to uninstalled mods.
Block entity repair
Identifies and removes block entities such as machines and chests left behind by uninstalled mods.
Automatic backups
Copies each modified file before changing it, so the original data can be restored.
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
1.20.x6 of 6 versions with builds
1.19.x3 of 3 versions with builds
1.18.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Worlds after mod removal
A world that fails to load because of leftover entries from an uninstalled mod can be repaired on load.
Who it’s for: Players who remove mods or datapacks from an existing world and want to clear the leftover references that prevent it from loading cleanly.
How it compares
SaveRestorer is a NeoForge mod for 1.21.1 that is client or server optional and open source under the MIT License. Entity Cleaner runs on Fabric, Forge, NeoForge and Quilt for 1.17 – 26.2, is server required with client optional, and is closed under All rights reserved. Dimension Fixer is a Forge mod for 1.20.1 that runs server-side only and is also under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Datapack Load Error Fix | Forge and NeoForge | 1.18.2 – 1.21.11 | Client-side only | 2026-02-15 |
| SaveRestorer | NeoForge | 1.21.1 | Client or server, optional | 2026-06-02 |
| Entity Cleaner | Fabric, Forge, NeoForge and Quilt | 1.17 – 26.2 | Server required, client optional | 2026-07-04 |
| Dimension Fixer | Forge | 1.20.1 | Server-side only | 2026-07-19 |
Questions
Which loaders does Datapack Load Error Fix support?
Does the mod need to be installed on a server?
Does Datapack Load Error Fix change files in a world?
In the catalog
Datapack Load Error Fix is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 19,862 mods support Minecraft 1.21.11.
More from dreamforSh
Similar mods
What the author says
A comprehensive Minecraft world repair utility that fixes common issues caused by removed mods and datapacks. Datapack Load Error Fix is a lightweight utility mod designed to help players recover and continue using their Minecraft worlds after removing mods. When mods that add custom dimensions, entities, or blocks…
Official listing
- Modrinth page
- modrinth.com/mod/datapack-load-error-fix
- Owner
- dreamforSh
- Published
- 2025-06-02
- Updated on Modrinth
- 2026-02-15
- Facts verified
- 2026-10-15