With one of my save files I cannot load into one particular household, It started after the last big update. It's the main save file i play so i have a lot of hours in this save. I have tried removing and disabling all mods and CC and i have had the same issue, cleared my cache folder, repaired the game multiple times and it's still happening. I can load into other households in the save, i have even tried moving the household onto an empty lot and it's still just loading and playing the game sound so i can hear my sims but cannot play with them as it's still stuck on the loading screen.
I have tried the below but was not able to get to step 3, i cannot force the save option to load up whilst loading the family with the issue.
Any help would be greatly appreciated.
Do you have any LastException files in Documents\Electronic Arts\The Sims 4 ?
- Delete the ones you have
- Trigger the error again
- Check if new ones are created
- If that is the case, please copy/paste the content here. You can open the file with any text editor.
Deleting the file won't fix your issue. Posting the info is meant for troubleshooting.
Done. All exceptions cleared and this was the one that came up after trying to load the save:
<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>48553b42dc3d60e468c1d656</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-10 20:54:05</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>developmental_milestone_tracker.py:1114</categoryid><desyncid>48553b42dc3d60e468c1d656</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\sims\masked\v185b\injector.py", line 26, in _wrapped_function File "T:\InGame\Gameplay\Scripts\Server\sims\masked\v185b\zone_tick.py", line 83, in _turbolib_zone_game_update File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 512, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1757, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1389, 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: 41.60 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,539,0,6052 Modded: True SystemInfo: Windows 11 10.0.26100 GPU: AMD Radeon (TM) Graphics 31.0.21912.4002, GUID: A4384425-BA82-11EF-8250-806E6F6E6963 </desyncdata></report>
</root>
I merged your post with the main thread. That's the developmental_milestones issue.
Please see first post for solution and cause.
