What Is Exit Code 1? - Minecraft Forge

If you see Exit Code 1 Minecraft Forge, it means the Minecraft launcher hit an error while loading installed mods. Incompatible Minecraft mods, outdated graphics drivers, or missing files in the Minecraft folder often cause this problem. To fix it, update Java, verify your installation, or reinstall Minecraft. Many users also solve the issue by checking logs, removing broken mods, or adjusting forge settings so the game runs smoothly again.

In this guide, we'll cover what is exit code 1 Minecraft Forge is, and how to solve it.

Why Does Exit Code 1 Happen?

• Incompatible Mods – Installing outdated or broken Minecraft mods can cause the game to crash with exit code 1.

• Java Issues – Running an unsupported or outdated version of Java.

• Improper Installation – If you didn’t correctly install or reinstall Minecraft.

• Graphics Drivers – Old or incompatible drivers.

How To Fix Minecraft Exit Code 1

• Install Java 17

• Make sure your graphics drivers are up to date by doing the following

1. Hit the Windows key and search for Device Manager

2. In the Display adapters section, right-click your GPU

3. Click on Update driver

• Make sure that all the mods are compatible with your Minecraft version and are updated to the latest version

• Allocate more RAM, which can be done by:

1. In your Minecraft launcher, head over to Installations

2. Select your profile, hit More Options

3. Change `-Xmx2G` to `-Xmx4G`

• Reinstall Minecraft

Still have some questions about Exit Code 1 in Minecraft Java Edition?

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Updated on: 16/09/2025