How to Fix Minecraft Incompatible FML Modded Server Issue

By Angel Marquez | 2023-06-22 07:16:37
Check out our step-by-step guide on How to Fix Minecraft Incompatible FML Modded Server Issue and get back.

Minecraft is one of the most popular video games in the world, with millions of players logging in every day to build, explore, and play with each other. However, sometimes players may encounter a frustrating issue when trying to join modded servers. This issue is often referred to as the "Minecraft Incompatible FML Modded Server" problem, and it can prevent players from playing on their favorite servers. In this blog post, we'll explore what causes this issue, how to identify it, and most importantly, how to fix it.

Understanding the Problem


The "Minecraft Incompatible FML Modded Server" problem occurs when the mods installed on a player's Minecraft client are not compatible with the mods installed on the server they are trying to join. This can happen when a player has outdated mods or when the server has mods that are too recent for the player's client. This problem can manifest in several ways, such as the game crashing, the player getting disconnected from the server, or the player being unable to join the server at all.

Solutions to Fix "Minecraft Incompatible FML Modded Server" Problem


Solution 1: Updating Minecraft and Mods


The first solution to try is to update both Minecraft and the mods installed on your client to the latest version. This is because compatibility issues often arise when a player's Minecraft or mods are out of date. To update Minecraft, follow these steps:

  • 1. Open the Minecraft Launcher.
  • 2. Click on the "Installations" tab.
  • 3. Select the Minecraft version you want to update, and click on the "Edit" button.
  • 4. Click on the "More Options" button.
  • 5. In the "JVM Arguments" box, add "-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M" (without the quotes).
  • 6. Click on the "Save" button.
  • 7. Click on the "Play" button to start the updated version of Minecraft.

To update your mods, follow these steps:

  • 1. Open your Mods folder.
  • 2. Select all the mods you want to update.
  • 3. Go to the official website of each mod and download the latest version.
  • 4. Replace the old version with the new one in your Mods folder.

Solution 2: Removing Incompatible Mods


If updating Minecraft and mods doesn't work, the next solution is to remove any incompatible mods. To do this, follow these steps:

  • 1. Open your Mods folder.
  • 2. Look for any mods that are causing the problem.
  • 3. Remove the incompatible mod from your Mods folder.
  • 4. Restart Minecraft and try to join the server again.

Solution 3: Using Compatibility Checker Tools


If you're still having trouble joining a modded server, you can use compatibility checker tools to identify and fix compatibility issues. Here are some of the best tools to use:

  • Minecraft Mod Compatibility Checker: This tool scans your mods and tells you which ones are incompatible with each other.
  • Forge Mod Compatibility Checker: This tool checks your mods against the server's mods and tells you which ones are causing the problem.
  • CurseForge Mod Compatibility Checker: This tool is similar to the Forge Mod Compatibility Checker, but it also suggests compatible mods to replace the incompatible ones.


The "Minecraft Incompatible FML Modded Server" problem can be frustrating, but it's not insurmountable. By following the solutions outlined above, you can fix the issue and get back to playing on your favorite modded servers. Remember to always keep your Minecraft and mods updated, and use compatibility checker tools to avoid future issues. Happy gaming!
Tags: Sandbox game, Mojang Studios, Minecraft mods, Minecraft servers, Minecraft tips, Minecraft updates, Minecraft crafting,
Platform(s): PC, macOS, Linux, PS4, Xbox One, Nintendo Switch
Genre(s): Sandbox, survival
Developer(s): Mojang, Xbox, Sony, Nintendo eShop
Publisher(s): Mojang, Microsoft Studios, Sony Computer Entertainment
Release date: 18 November 2011
Mode: Single-player, multiplayer
Age rating (PEGI): 7+
Video preview



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