PackCENHeaderFix

PackCENHeaderFix

There is no longer an error `invalid CEN header (bad entry name or comment)

by
936 Downloads
fabricforgeneoforgequiltoptimizationutility
Rent Server with this Mod

Screenshots

Vanilla Zip Error

About this Mod

PackCENHeaderFix

There is no longer an error invalid CEN header (bad entry name or comment)

It solves this problem by replacing Java Zip implementation with Apache Commons Compress implementation.

Example Story

You downloaded a ResourcePack from a RP author. You put it in your RP folder and tried to load it as usual, but you don't see it in the RP selector.

Instead, Minecraft prints the following error in the log:

136fae32511da386f54de944925e101fee8c6527.png

It doesn't appear in Mojira, precisely because it's a bug that only appears under very extreme conditions. I haven't seen it in the past few years of the game, and only very, very few RP authors have accidentally allowed their RP to be contaminated by this bug.

The cause of this bug is unknown, but it only affects the Java Zip implementation. RPs that experience this bug can still be force-loaded (although you won't be able to find them in the selector), but I think it's better to try to fix it.

About API

It's intended for use with another mod of mine, which will rely on this one for additional functionality.

If you want to do something with it, my advice is don't, I don't want it to behave unexpectedly.

How to build?

After the clone repository, be sure to use the ./gradlew clean build command to build,
rather than executing any of them separately.

After the build is completed, a jars folder will be generated in the root directory,
where the final build results will be stored.

For Modpack

If you comply with the license, you can use it freely for Modpack.

Modpacks that redistribute Minecraft game body (i.e. packages that package the entire Minecraft game including Mod files, Config, ShaderPacks, ResourcePacks, Library and launcher into a whole zip file) are not allowed to use this mod.

License

This work has a restrictive license in addition to the original license to prevent some unexpected behavior, see 404Setup Public License

Available Versions

[Fabric 26.1] PackCENHeaderFix - 0.0.5+26.1release
MC 26.1, 26.1.1fabric
March 29, 2026
[NeoForge 26.1] PackCENHeaderFix - 0.0.5+26.1release
MC 26.1, 26.1.1neoforge
March 29, 2026
[NeoForge 1.21.11] PackCENHeaderFix - 0.0.4+1.21.11release
MC 1.21.11neoforge
December 11, 2025
[Fabric 1.21.11] PackCENHeaderFix - 0.0.4+1.21.11release
MC 1.21.11fabric
December 11, 2025
[Forge 1.21.11] PackCENHeaderFix - 0.0.4+1.21.11release
MC 1.21.11forge
December 11, 2025

How to Install PackCENHeaderFix on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.1).

3

Install Mod

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

Compatibility

Mod Loaders

fabricforgeneoforgequilt

Minecraft Versions

26.1.1, 26.1, 1.21.11 (+98 more)

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

PackCENHeaderFix 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 (26.1.1). You can switch loaders with one click in the panel.

Is PackCENHeaderFix compatible with fabric and forge and neoforge and quilt?

PackCENHeaderFix officially supports fabric, forge, neoforge, quilt for Minecraft 26.1.1, 26.1, 1.21.11. 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 PackCENHeaderFix – how to optimize performance?

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

Rent Modded Server

Install PackCENHeaderFix with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
GNU Lesser General Public License v3.0 only
Server-side
Optional

Supported Versions

26.1.126.11.21.1125w44a25w43a25w42a25w41a1.21.101.21.10-rc11.21.9+91 more