Minecraft Modpack Server Won't Start – CurseForge, RAM & Java

Quick answer: Modpack won't start: increase RAM (8–16 GB), Java 17, exact same Forge/NeoForge version as pack and read logs/latest.log + crash-reports/.

If you landed here: ATM, RLCraft, FTB or All the Mods crashes on mod loading, OutOfMemoryError or "Mod X requires Y".

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Frequently asked questions (FAQ)

How much RAM for modpack server?

Light packs (50 mods): 6–8 GB. ATM/ATM9, All the Mods: 10–16 GB. RLCraft: 8–12 GB. Adjust -Xmx in panel or upgrade plan.

Modpack crashes with OutOfMemoryError?

Increase RAM in panel (-Xmx10G or more). Not just slots – modpacks need large heap. Use Aikar flags for Forge.

Install CurseForge modpack on server?

Download server files ZIP from CurseForge, extract, start.bat/server.jar with same Forge/NeoForge version as pack. Copy mods/ and config/.

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Minecraft Modpack Server Won't Start – CurseForge, RAM & Java

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Frequently asked questions (FAQ)

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