LE: SingleSimResolver with unsupported participant/110:83165b0

HI youngauthor05​ 

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. 

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>da940226ffc0fd6068bd84cb</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-07 06:16:38</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>resolver.py:1060</categoryid><desyncid>da940226ffc0fd6068bd84cb</desyncid><systemconfig/><screenshot/><desyncdata>Exception raised while processing zone spin up sequence: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSim (ValueError: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSim)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\utils\localization_tokens.py", line 1096, in &lt;genexpr&gt;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\utils\localization_tokens.py", line 780, in _get_token&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\tunable_utils\tunable_object_generator.py", line 58, in get_objects&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\event_testing\resolver.py", line 1060, in get_participants&#13;&#10;ValueError: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSimrtim=0&#13;&#10;Client Session Time: 41.34&#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: 13,539,0,6052&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26100 GPU: NVIDIA GeForce GTX 1050  32.0.15.6614, GUID: BDFB027D-DE07-11EF-B619-D5DCD139313A&#13; &#10;</desyncdata></report>
</root>

Hi youngauthor05​ 

thank you for the LE. That is a known issue.

Please try the following

1. Create a backup of your save game
2. Try loading a different household (try another world if it doesn't work in the same one)
3. If you can load another, save your game.
4. Go back to the map and see if you can now load the other household as well.
5. If not, try closing the game and starting it again and try again.

Ok amazing!

I opened another household in that save, saved the game, returned to the map, and then reopened the original household, which seemed to work. 

I also opened one of my other save files to check if it was isolated to only this saved world, and it seems to be an isolated incident to this one save. 

Thank you!

I am having the same issue. I just paid for another year with EA and can't play. I have done the repair through the app, deleted the EA app., and did a reinstall. I sent in a report and have heard nothing. 

It looks like I have a few Last Exception files. Would you like me to post mine since we are having the same issue?

Hi GReign19​ 

yes please. Make sure to c/p the content of the file.

I now also show the last crash code, which wasn't there before. 

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>532a357dc7092d6568c76a83</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-14 20:25:48</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>resolver.py:1060</categoryid><desyncid>532a357dc7092d6568c76a83</desyncid><systemconfig/><screenshot/><desyncdata>Exception raised while processing zone spin up sequence: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSim (ValueError: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSim)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\utils\localization_tokens.py", line 1096, in &lt;genexpr&gt;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\utils\localization_tokens.py", line 780, in _get_token&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\tunable_utils\tunable_object_generator.py", line 58, in get_objects&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\event_testing\resolver.py", line 1060, in get_participants&#13;&#10;ValueError: Trying to use SingleSimResolver with unsupported participant: ParticipantType.TargetSimrtim=0&#13;&#10;Client Session Time: 30.03&#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: 13,550,0,6063&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26100 GPU: Intel(R) UHD Graphics  30.0.100.9864, GUID: E5035E34-3E2B-11F0-A816-F26F7B93306D&#13; &#10;</desyncdata></report>
</root>

I have tried to play Sims 4 for well over a week. I have sent 2 reports and have not received a reply. I have repaired the app, uninstalled everything more than once, cleared caches, and made sure my laptop was up to date. I have cleared the history and turned off all apps running in the background. I even created an older post where I shared the last exception code, and I have heard nothing back at ALL. I do not use MODS, nor do I have any viruses, etc. I recently paid for another year and now can't play. I have spent a lot of money on various packs and expansions. 

What do I need to do to play my game again? This is happening way too often, and I am seriously thinking it is time to talk to an attorney. Fix the issues or give me ALL of my money back, and I mean all of it. You can come up with a free play update, but can't fix my issue??? I have been playing Sims for 15 plus years. We deserve better!

EA, you let me know, do I get all my money back for all I have spent, this includes money for every single package and expansions, etc., or do you fix it?