Oh also:
I tried loading into a different household in that savefile - worked.
I tried moving out my family and load into the build mode of the lot: worked.
I tried editing my family in CAS: worked.
And I also tried putting my family on another lot to play with it on there: It did not work...
Here's the last expection txt that came after all that (of course I deleted the others before loading the game)...
<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>610af256f3a41b8668d42419</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-24 19:07:57</createtime><buildsignature>Local.Unknown.Unknown.1.118.242.1030-1.200.000.677.Release</buildsignature><categoryid>developmental_milestone_tracker.py:1114</categoryid><desyncid>610af256f3a41b8668d42419</desyncid><systemconfig/><screenshot/><desyncdata>Exception raised while processing zone spin up sequence: 'Object not found: 0xcdf3a7b7' (KeyError: 'Object not found: 0xcdf3a7b7') Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 179, in wrapper File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 222, in c_api_server_tick File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 512, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1767, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1399, in on_update File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 741, in on_hit_their_marks File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 1142, in _set_zone_state File "T:\InGame\Gameplay\Scripts\Core\sims4\callback_utils.py", line 158, in __call__ File "T:\InGame\Gameplay\Scripts\Server\developmental_milestones\developmental_milestone_tracker.py", line 1206, in send_all_milestones_update_to_client File "T:\InGame\Gameplay\Scripts\Server\developmental_milestones\developmental_milestone_tracker.py", line 1114, in _get_milestone_update_msg KeyError: 'Object not found: 0xcdf3a7b7'rtim=0 Client Session Time: 14.63 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,550,0,6063 Modded: False SystemInfo: Windows 11 10.0.26100 GPU: NVIDIA GeForce RTX 4070 Ti 32.0.15.7628, GUID: CBED7ED0-2D23-11F0-96D3-9CE732E7893F </desyncdata></report>
</root>
