FailSafeBlocks

replacing missing blocks with colorful placeholders instead

819 Downloads

neoforgemanagementutilityworldgen

Rent Server with this Mod

Screenshots

About this Mod

FailSafeBlocks

Fix your broken worlds! This mod replaces missing blocks with colorful placeholders instead of crashing.
missing replace

What it does

Catches missing blocks when loading chunks and replaces them with colored placeholders
Uses 128 different colored placeholder blocks to help identify different missing blocks
Maps the same missing block ID to the same placeholder consistently
Works with any modded world - great for when you've uninstalled mods

How to use

Install the mod
Load your world that has missing blocks
The mod will automatically replace missing blocks with placeholders
You can mine and replace the placeholders like normal blocks

feel free to use on modpacks

Available Versions

FailSafeBlocks 1.0-SNAPSHOTbeta

MC 1.21.1neoforge

March 24, 2025

How to Install FailSafeBlocks on Your Server

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

✓ Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

FailSafeBlocks server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is FailSafeBlocks compatible with neoforge?

FailSafeBlocks officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with FailSafeBlocks – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if FailSafeBlocks 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.