Cobblemon Crashing? Fixes for Cobblemon and Cobbleverse (2026)

Short answer: Most Cobblemon and Cobbleverse crashes come from three things: not enough RAM, extra mods or shaders that conflict with the modpack, or an outdated modpack. Give the game 4 GB of RAM or more, remove any mods or shaders you added yourself, and update the modpack in the CurseForge App. If it still crashes, reinstall the modpack and send your crash report to support. On Complex Cobblemon, we recommend playing the official modpack exactly as it comes, in the CurseForge App.

Fix 1: Give it more RAM​

Modpacks need much more memory than regular Minecraft, and running out of memory is the number one cause of crashes and freezes.

• Cobblemon modpacks: 3 to 5 GB, with 4 GB working best for most computers.
• COBBLEVERSE: at least 4 GB, and 6 GB or more is recommended.

In the CurseForge App, go to Settings, then Minecraft, then Java Settings, and set Allocated Memory. In the Modrinth App, open the modpack's settings and set the memory. Don't give it more than about half of your computer's total RAM.

Fix 2: Remove extra mods and shaders​

Shaders and mods you add yourself are one of the most common causes of crashes we see. They can conflict with the mods already in the pack.

1. Remove any mods, shaders or resource packs you added after installing the modpack.
2. Launch the game. If it works, the problem was one of the files you added.
3. Add them back one at a time to find the one causing the crash.

Unless you know what you're doing, play the modpack exactly as it comes. If you do want to add shaders, see How to Add Shaders and Mods to Cobblemon.

Fix 3: Update the modpack​

Old versions can crash or fail to join servers. In the CurseForge App or Modrinth App, click Update on the modpack when it appears, then launch again.

Fix 4: Reinstall the modpack​

If nothing else works, files may be broken. Delete the modpack from your launcher and install it again from its official page, like the Complex Cobblemon modpack on CurseForge. Back up any single player worlds first.

Crashes when riding, battling or opening the PC​

If the game only crashes during one action, like riding a Pokémon, starting a battle or opening the PC, it's almost always an added mod or shader conflicting with Cobblemon, or an outdated modpack. Remove anything you added (Fix 2) and update the modpack (Fix 3).

Cobblemon and Lunar Client​

• Complex Cobblemon modpack: works with Lunar Client, but we recommend the CurseForge App for the fewest problems.
• COBBLEVERSE: doesn't work with Lunar Client. Install it with the CurseForge App instead.

Other common errors​

• "Mismatched mods", "outdated client" or "outdated server": your modpack doesn't match the server. Update it and don't add or remove mods.
• Stuck on the loading screen: the first launch is slow, so give it a few minutes. If it never finishes, raise your RAM and restart the launcher.
• Missing textures on Complex: type /resourcepack in game.
• Low FPS or lag: lower your render distance to 8 to 10 chunks and turn off shaders.
• Keybinds not working: open Options, Controls, Key Binds and check that two mods aren't using the same key.

How to get help​

Still crashing on Complex Cobblemon? Open a support ticket on our Cobblemon & Pixelmon Discord. Include your crash report, which you can find in the crash-reports folder of your modpack (in CurseForge, right-click the modpack and choose Open Folder), and tell us what you were doing when it crashed.

Cobblemon Crashing FAQ​

Why does Cobblemon keep crashing?​

Why does Cobbleverse crash on launch?​

How much RAM does Cobblemon need?​

Do shaders cause Cobblemon to crash?​

Does Cobblemon work with Lunar Client?​