Missing dependenciesNoClassDefFoundError: eureka/api/EurekaAPI (Missing Eureka Mod)
What the log looks like
java\.lang\.NoClassDefFoundError:\s*eureka/api/EurekaAPI
java\.lang\.ClassNotFoundException:\s*eureka\.api\.EurekaAPI
How to fix it
- Download the Eureka mod for Minecraft 1.7.10 from CurseForge and place its .jar file into your Minecraft mods folder.
- Check that Buildcraft Additions is updated to the latest 1.7.10 release, as newer builds either properly enforce dependencies at startup or handle missing Eureka compatibility safely.
- If you are running a server, install Eureka in both the server and client mods folders before rejoining the world.
| Loaders | Forge |
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| Severity | Stops the game |
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| Category | Missing dependencies |
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Check your own logDownload eureka on 9Minecraft