
ModPacketFix
A plugin that fixes some of the too big/too small packet errors that occur when connecting to a Vanilla server with a Forge client.
⬇ Download on ModrinthModPacketFix
A plugin that fixes some of the too big/too small packet errors that occur when connecting to a Vanilla server with a Forge client.
Please Note: Some fixes require the Forge user to reconnect to the server
Link to my development Discord
When reporting an issue or requesting a packet fix, please include the following:
- Client version and type (Forge, Vanilla, etc.)
- Server version and type (Spigot, Paper, etc.)
- Velocity version and Ambassador version
- Mod list
- Install Spit it Out, recreate the error, then include the Client log file
- Server log file
- Velocity log file
Download
Dependencies
Required Dependencies
- ProtocolLib - For Bukkit/Spigot/Paper servers
Fixes Implemented
- Server sending a recipe book packet that is too big
Common Forge Client Errors
Too Many Channels
Client error:
Invalid payload REGISTER!
Server error:
[00:00:00 ERROR]: Couldn't register custom payload
java.lang.IllegalStateException: Cannot register channel 'modid:channel'. Too many channels registered!
Fix:
Add -Dpaper.disableChannelLimit=true to the server's startup arguments
Note:
Due to the amount of channels and mods at play, textures/items may be mismatched on the client
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.13, 1.13.1, 1.13.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as ModPacketFix-1.0.2.jar — drop this file into the mods folder
- Download size: 15 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.