# Factorio Server Won't Start – Mods, Save & Port 34197

Factorio dedicated server won't start? Mod errors, corrupt save, server-settings.json, port 34197 – step-by-step troubleshooting.

**Quick answer:** Factorio won't start: **read factorio-current.log**, **check mods**, test **save backup** and open port **34197 UDP**.

**If you landed here:** Dedicated server crashes on start, mod errors in logs or restart loop in panel.

## Related

- [Factorio won't connect](/en/gameserver/factorio/server-verbindet-nicht)
- [Factorio server lagging](/en/gameserver/factorio/server-laggt)
- [Install Factorio](/en/gameserver/factorio/install)
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