Block Limit Fix

Fixes a vanilla bug limiting total Blockstates to ~500k

6.4K Downloads

fabricforgequiltlibraryutility

Rent Server with this Mod

About this Mod

Block Limit Fix

This mod fixes a vanilla bug that
occurs when there's roughly 500k unique Blockstates. When this bug is triggered,
a range of issues can occur from ghost blocks to desyncs.

Specifically, beyond 524288 states, the math for serializing the states to packets
breaks down due to a misplaced cast. This bug is fixed in 1.19.4 / 1.20, whichever
comes first. This mod backports it to older versions.

Thanks to Patbox for debugging this and figuring
out the solution.

Available Versions

Forge 1.0.5 (1.17.1+)release

MC 1.17.1, 1.18.2, 1.19.2, 1.19.3forge

October 5, 2023

Fabric 1.0.5 (1.17.1+)release

MC 1.17.1, 1.18.2, 1.19.2, 1.19.3fabric, quilt

October 5, 2023

Forge 1.0.4 (1.16.5)release

MC 1.16.5forge

October 5, 2023

Fabric 1.0.4 (1.16.5)release

MC 1.16.5fabric, quilt

October 5, 2023

Forge 1.0.3release

MC 1.16.5, 1.17.1, 1.18.2, 1.19.2, 1.19.3forge

January 6, 2023

How to Install Block Limit Fix 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 (1.19.3).

Install Mod

Open the mod browser in the dashboard and search for "Block Limit Fix". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgequilt

Minecraft Versions

1.19.3, 1.19.2, 1.18.2 (+2 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Block Limit Fix 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 (1.19.3). You can switch loaders with one click in the panel.

Is Block Limit Fix compatible with fabric and forge and quilt?

Block Limit Fix officially supports fabric, forge, quilt for Minecraft 1.19.3, 1.19.2, 1.18.2. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Block Limit Fix – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Block Limit Fix 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.