Most Ice And Fire Mod problems come from a handful of predictable causes: a missing library, mismatched versions or the wrong file type. This guide shows where to look for evidence and how to fix each common case without guessing.
Start with the evidence
Before changing anything, find out what the game reported. Two places matter:
logs/latest.loginside your game directory records the most recent launch.crash-reportscontains a timestamped file for each crash.
Search these files for the words Missing, requires, Exception and the name of any mod mentioned near the error. The mod named in the error is often, though not always, the cause.
Common problems and their fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| Forge lists a missing mod or dependency | Citadel is absent or the wrong version | Install the Citadel build for your exact Minecraft version |
| Crash immediately on launch | Mod built for a different Minecraft or Forge version | Match Minecraft, Forge, Citadel and Ice And Fire to one version |
| Mod does not appear in the Mods list | A source ZIP or unzipped folder was placed in mods | Use a compiled .jar; see the step-by-step install guide |
| Game freezes or closes while exploring | Not enough memory allocated | Raise the memory allocation modestly in your launcher |
| Crash only with a larger modpack | Conflict with another mod | Test with only Citadel and Ice And Fire, then add mods back in groups |
| Error mentions Java or class version | Wrong Java runtime | Use the runtime your Minecraft version expects, such as Java 17 for 1.18.2 |
Isolate the problem
- Copy your
modsfolder somewhere safe. - Leave only Citadel and Ice And Fire in
modsand launch. - If that works, add the other mods back in small groups until the crash returns.
- The last group added contains the conflict; narrow it down one mod at a time.
When a world will not load
If the game starts but one world crashes, the problem may be tied to saved data, for example after changing mod versions. Restore the backup you made before updating, or test the same world with the previous mod version. For moves between the original line and the Community Edition, see the Community Edition explainer.
Reporting a bug properly
If you believe you have found a real bug, report it to the mod's own issue tracker rather than to third-party sites. Include your Minecraft, Forge, Citadel and Ice And Fire versions, a full list of mods, and the crash report file. Search existing reports first; many crashes have already been diagnosed.
Ready to set up? Head to the Ice And Fire Mod download section or return to the full guide index.