Datapack Error Viewer
See datapack loading errors in GUI
Screenshots
About this Mod
This mod displays datapack loading errors in the game UI so that you don't have to open the log to see the error.
Note this only applies to datapack files that prevent world load in vanilla, such as enchantments and painting variants. Files like tags and loot tables fail soft and don't prevent the world from loading, thus no screen is shown. This may be addressed in future releases.
Does nothing when connecting to multiplayer servers.
Available Versions
How to Install Datapack Error Viewer on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.2).
Install Mod
Open the mod browser in the dashboard and search for "Datapack Error Viewer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2, 26.1.2, 26.1.1 (+4 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Datapack Error Viewer server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.2). You can switch loaders with one click in the panel.
Is Datapack Error Viewer compatible with fabric?
Datapack Error Viewer officially supports fabric for Minecraft 26.2, 26.1.2, 26.1.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Datapack Error Viewer – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Datapack Error Viewer consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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