How to Fix an ATM10 To the Sky Server That Keeps Crashing
All the Mods 10: To the Sky runs ATM10's full mod list from a skyblock start. Reported crash causes cluster around four things, in roughly this order of how often they show up: a client-only mod in the server's mods folder, a mismatched loader build, the wrong Java version, and RAM below the real floor.
See the ATM10 To the Sky pack page and the base ATM10 boot data for the heavier ground-pack floor this one grows toward.
1. A client-only mod sitting in the server's mods folder
The single most common self-inflicted crash across every ATM-family pack: installing from the CLIENT download instead of the pack's dedicated SERVER files. The client bundle includes shader packs, HUD overlays and other mods with no server-side purpose, and some throw a hard crash the moment a dedicated server tries to load them.
Fix: always install from the pack's SERVER FILES link on CurseForge, never the client pack with client-only mods stripped by hand.
2. A loader build that doesn't match the pack version
Every ATM10SKY release is built and tested against one specific NeoForge build. A newer or older NeoForge — even one that looks compatible on paper — can throw crashes that have nothing to do with any individual mod.
Check the pack's manifest or the server-files README for the exact NeoForge version the release expects, and match it precisely rather than installing 'latest'.
3. The wrong Java version
ATM10-family packs run on modern Minecraft versions that require a current Java release, not whatever default JDK happens to already be on a host. An old Java install is a quiet, easy-to-overlook cause of startup failures that look identical to a mod conflict.
4. RAM below the real floor
ATM10SKY is commonly reported running on 8-12 GB for a small group — lighter than base ATM10's measured 16 GB floor, since the skyblock start has less built out initially. That gap closes fast once a real base and automation chain exist, so size for where the server is headed, not just its first few minutes.
FAQ
Does ATM10 To the Sky need as much RAM as base All the Mods 10?+
Our own boot probe measured base ATM10 at a 16 GB floor on dedicated hardware. ATM10SKY runs lighter at the start (8-12 GB is commonly reported as enough for a small group), but it shares the same mod list — once a real base and automation chain exist, it climbs toward the same territory as the ground pack.
My ATM10SKY server crashes right after I copy over my client mods folder — why?+
The client install bundles shader packs, HUD mods and other client-only additions that have no server-side logic. Copying the whole client mods/ folder onto a dedicated server is one of the most common self-inflicted crash causes across every ATM-family pack, not just the sky variant — always install from the pack's dedicated SERVER files, not the client pack.
What's 'a loader build that doesn't match the pack version'?+
Every modpack version is built and tested against one specific NeoForge build number. Installing a newer or older NeoForge than the one the pack's manifest specifies is a common, easy-to-miss mistake that throws crashes mods alone would never cause.
Host ATM10 To the Sky from the real server files, sized correctly
CoalHost installs ATM-family packs from the pack's dedicated server files — never the client download — and sizes RAM above the reported floor from first boot.
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