Error code 123: 259a6556: 5e24aec7

I just had this issue as well, so I created a new file altogether (just renamed my old one, so it would trigger a new one) and it loaded the household fine. So off to do a 50/50 - I'll let you know what I find out. 

leoparduniverse7​  Then try loading a backup version of that save:

https://sims4.crinrict.com/eng/2014/09/recover-backup-save-game/

It happened after updating the game. After selecting the "new game" option, I started over and created a new sim. I placed the sim somewhere, and when I tried to play the game, it gave me an error code. When I tried to play with any family, it gave me an error code every time. How can I solve this problem?
error code was written like this: 

The game failed to load. Error Code:

123:259a6556:5e24aec7. It is recommended that you relaunch the game.

Hi nevramirayz​ 

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. 

I was planning on playing the Sims today, but it decided otherwise. I opened The Sims, selected my save, chose my world/area, selected my household, and then attempted to hit play. There would be a load screen for a while, and then it would glitch back to the screen where I would select which world/area. Eventually, it would display an error code pop-up saying: "The game failed to load. Error Code:123:259a6556:5e24aec7. It is recommended that you relaunch the game."

The first time I restarted my game, I followed the same process and got the same message. Then I restarted my Mac, restarted the game again, etc, with no change. So I closed the game but EA didn't say the game needed an update so I hit the repair button a couple of times (not knowing it was always there lol), hoping that would fix it. Then I got my dad involved (25+ years in game and tech industries), and after a while, we came to the conclusion that I would uninstall the game and then save my saves, mods, and tray folder (households/lots/rooms/etc) separately and then add them back into the game later. 

I removed my data from my old Sims, uninstalled the game, restarted everything, and then reinstalled the game. I came back when it was installed and checked to see if it was working (just by starting it up, assuming it's playable without my additives?) and then exited the game to add my mods and such. After adding them to their respective folders, I reopened the game and tried to play my save to no avail. And now I'm unsure what to do. 

Additionally, I know it's not my household because I can't even play a new household both before and have I reinstalled the game

If anyone has any advice I'm willing to try it- I hope its not my saves/mods/and tray because I really don't want to lose all by data just because it had to update? Is anyone else having this problem?

BlackCrowWrites​ 

could you provide the info asked here: Error code 123: 259a6556: 5e24aec7. | EA Forums - 12397425 

I did this. And this is what I got:

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>a89772bf2d869e756685e6be</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2024-07-04 00:12:45</createtime><buildsignature>Local.Unknown.Unknown.1.107.151.1020-1.300.000.182.Release</buildsignature><categoryid>(AS)widgets.shared.controls.Traits::TraitsMolecule</categoryid><desyncid>a89772bf2d869e756685e6be</desyncid><systemconfig/><screenshot/><desyncdata>TypeError: Error #1009: Cannot access a property or method of a null object reference.&#13;&#10;    at widgets.shared.controls.Traits::TraitsMolecule/DrawSimMolecule()&#13;&#10;    at widgets.shared.controls.Traits::TraitsMolecule/Draw()&#13;&#10;    at widgets.Exchange.Detail.controls::DetailThumbnailPanel/DisplaySimInfo()&#13;&#10;    at widgets.Exchange.Detail.controls::DetailThumbnailPanel/UpdateMainThumbnail()&#13;&#10;    at widgets.Exchange.Detail.controls::DetailThumbnailPanel/OnThumbnailSelectionChanged()&#13;&#10;    at olympus.controllers::SelectableGroup/SetSelectionAs()&#13;&#10;    at olympus.controllers::SelectableGroup/OnButtonClick()&#13;&#10;    at olympus.gui.buttons::Button/OnMouseRelease()&#13;&#10;rtim=57026&#13;&#10;Client Session Time: 9.16&#13; &#10;Num Save Errors: 0&#13; &#10;Num Load Errors: 0&#13; &#10;Current Game State: 0x96d01090&#13; &#10;LoadingScreenActiveFlag: 1&#13; &#10;Origin Version: 13,241,1,5748&#13; &#10;Modded: True&#13; &#10;SystemInfo: Windows 11 10.0.22631 GPU: AMD Radeon(TM) Graphics aticfx64.dll 31.0.12044.56000, GUID: D7B71EE2-550C-11CF-DAAE-99306EC2D235&#13; &#10;</desyncdata></report>
</root>

I cannot play the game even though I tried to create a new game

NJleGore​ Please remove your mods.

I had the same experience with a totally clean game with no packs and no mods.  The most basic blank original game and it goes to create a sim and then once I try to enter a chosen lot, it's kicked back to the world map.  An error comes up that it broke and that I should try to restart.

Hey crinrict​ I just noticed your reply

I deleted four LastException files and tried to start my game. After multiple attempts I wasn't even getting my error code anymore- anyway I got a new LastException file and here is what it says:

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>65f993a4a69ffa4968b77a24</sessionid><type>desync</type><sku>ea.maxis.sims4.15.macx86</sku><createtime>2025-09-02 19:13:52</createtime><buildsignature>Local.Unknown.Unknown.1.117.227.1230-1.200.000.673.Release</buildsignature><categoryid>asm.py:378</categoryid><desyncid>65f993a4a69ffa4968b77a24</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Error during initialization of service tuning_instance_manager. This will likely cause additional errors in the future. (TypeError: ASM key is not of instance str or ResourceKey)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\postures\posture_animation_data.py", line 295, in get_supported_postures_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\asm.py", line 128, in create_asm&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\asm.py", line 378, in __init__&#13;&#10;TypeError: ASM key is not of instance str or ResourceKeyrtim=0&#13;&#10;ClientInfo isn't here</desyncdata></report>
</root>

Any futher advice is appreciated.