How to Fix an ATM6 To the Sky Server That Keeps Crashing
All the Mods 6 - To the Sky keeps its own GitHub issue tracker (atm6-sky), separate from base ATM6 — and it has a repeated pattern of startup crashes and config corruption, not the same complaints as the ground version. Here's what the pack's own bug reports point to.
See the ATM6 To the Sky pack page for sizing before you chase anything else.
1. Crash on startup, before the world even loads
The pack's own GitHub repo has multiple reports of the server crashing on launch, before a world is even generated. This is a different failure mode from a mid-game crash and usually points at the Java/loader setup rather than anything happening in-world.
Confirm the server is on the exact Forge/NeoForge build the pack's own server-files download specifies — a mismatch here throws the earliest possible crash, often with no useful error beyond a generic launch failure.
2. Corrupted config files
A corrupted config is one of the most repeated root causes in the pack's bug tracker — the fix the ATM team itself gives is to replace the single broken config file with a clean copy from the official server files, not to patch the existing one.
A config that looks fine in a text editor can still fail silently at parse time, which is why 'it looks correct' isn't a reliable signal here — replace rather than inspect.
3. Intermittent crashes with no consistent cause in the log
Several reports describe a server that restarts repeatedly with a new, different-looking crash report every few minutes — not the same error twice. That pattern usually means something upstream (a corrupted world chunk, a bad config, or insufficient RAM) is cascading into whatever mod happens to touch the broken state next, rather than one specific mod being at fault.
Rule out RAM and a clean config first; chasing the specific mod named in each crash report rarely fixes this class of instability.
FAQ
Is ATM6 To the Sky maintained separately from base ATM6?+
Yes — the ATM team runs atm6-sky as its own GitHub repository, separate from the base ATM-6 repo. Bugs filed against one don't automatically apply to the other, even though the underlying mod list overlaps heavily.
My server crashes every time on startup — what's the first thing to check?+
Check the server log for a config-loading error before anything else. A corrupted config file is one of the most repeated crash-on-startup reports in the pack's own issue tracker, and it's fixed by replacing just that one file from a clean copy of the pack — not by reinstalling everything.
Where do I get a clean config to replace a corrupted one?+
Re-download the server files from the pack's official CurseForge page and pull the single config file from there, rather than editing the broken one — a partially-corrupted config can look fine when opened in a text editor but still fail to parse.
Host ATM6 To the Sky on the exact loader build it needs
CoalHost installs ATM-family packs from the pack's own server files — the exact loader build and configs the ATM team ships, not a guess.
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