TaCZ Pack Upgrader

TaCZ Pack Upgrader

Only required on unofficial TaCZ 1.21.1

by
81.2K Downloads
neoforge
Rent Server with this Mod

About this Mod

TaCZ Pack Upgrader

This mod is completely unrelated if you're using the official TaCZ
Automatically upgrades the gun packs to be compatible with TaCZ 1.21.1

Basic Usage

  1. Install the mod
  2. Put the gun packs into the tacz folder as usual
  3. Launch the game and the packs will be upgraded and loaded automatically

About .jar Files

There are two types of .jar files in the context of TaCZ:

  1. .jar gun packs
    • Maxstuff, Daffa's Arsenal, Gucci & Vuitton Attachments, LesRaisins Append Pack, etc.
  2. .jar mod addons (which still can include gun packs)
    • TaCZ Tweaks, LesRaisins Tactical Equipments, TaCZ Durability, etc.

The upgrader can handle gun packs, but not mod addons; it's impossible to upgrade mods from 1.20.1 to 1.21.1 programatically

You need to put the .jar gun packs into the tacz folder, not the mods folder
After that, everything should be handled automatically

Troubleshooting

  • Some gun packs may contain some dependencies to some of the mod addons (e.g. LesRaisins Tactical Equipments)
    • In that case you can't really do anything, since those addons doesn't exist on 1.21.1
    • Maybe you could find an older version of the pack that doesn't have the dependencies

License

LGPLv3

Available Versions

TaCZ Pack Upgrader 2.1.1release
MC 1.21.1neoforge
May 9, 2026
TaCZ Pack Upgrader 2.1.0release
MC 1.21.1neoforge
May 8, 2026
TaCZ Pack Upgrader 2.0.0release
MC 1.21.1neoforge
September 25, 2025

How to Install TaCZ Pack Upgrader on Your Server

1

Order Server

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

2

Set neoforge Loader

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

3

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

TaCZ Pack Upgrader 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 3 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 TaCZ Pack Upgrader compatible with neoforge?

TaCZ Pack Upgrader officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with TaCZ Pack Upgrader – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if TaCZ Pack Upgrader 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 TaCZ Pack Upgrader 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 or later
Server-side
Optional

Supported Versions

1.21.1