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rococofall's avatar
rococofall
Seasoned Rookie
3 days ago
Status:
Verified

Game Crashing After Deleting Default Royal Families - Save File Unplayable

Game Version: 1.121.361.1020
PC/Mac: PC (Windows 10)
Packs Installed: All Expansion Packs up to Businesses & Hobbies, most Game/Stuff Packs (see attached list)
Mods Installed: Yes (MC Command Center, UI Cheats, and various others)
Date: February 16, 2026

Issue Description

After deleting several default royal/NPC families from the Manage Worlds screen, my save file has become completely unplayable. The game crashes consistently with a lastException error from MC Command Center.

Steps to Reproduce

    1,  Deleted all royal families, 2,Attempted to re-enter the save file, 3,Game crashes to desktop with MC Command Center error

Error Details

The MC Command Center lastException shows:

Recommended ActionNo mods were listed in the exception but you do have mods installed.
Close your game, try removing handfuls of mods from your Mods folder and retry what you did when you received the exception.
If the exception does not occur then the problem is likely with that mod.
Check the mod download for any recent updates.
Possible Cause

(Confidence: 10%)

dynasty_tunings
ReasonException raised while processing zone spin up sequence: 'NoneType' object has no attribute 'id' (AttributeError: 'NoneType' object has no attribute 'id')

Observations

  • The error appears related to dynasty/genealogy data being corrupted
  • It seems the game's family tree system cannot handle the removal of certain default households
  • The game tries to process relationships for deleted Sims but finds "null" references

 

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