Sims 4 crashing: An error on our end caused the launch to fail.

Batkrook92​  The python37_x64.dll error is what we normally see with with your class of CPU.  Since updating the BIOS didn't help, please boot into BIOS, open the Advanced settings, and look for a CPU Turbo Boost setting or similar.  If you see it, disable it, then test the game again.

If you're not sure what you're looking at, feel free to list the settings you find.  I can't tell you what's there because each BIOS is a bit different, some are wildly different even from the same manufacturer, and they can change with updates (and those changes don't always make it into the documentation).  But it's easy to figure out what a particular setting does once you know its name.

I've now updated the BIOS and had another crash. 

Here is the information from the Reliability Monitor:

Description
Faulting Application Path:    C:\Program Files\EA Games\The Sims 4\Game\Bin\TS4_x64.exe

Problem signature
Problem Event Name:    APPCRASH
Application Name:    TS4_x64.exe
Application Version:    1.120.117.1030
Application Timestamp:    691dd246
Fault Module Name:    python37_x64.dll
Fault Module Version:    3.7.150.1013
Fault Module Timestamp:    67f85748
Exception Code:    c0000005
Exception Offset:    000000000004423b
OS Version:    10.0.26200.2.0.0.768.101
Locale ID:    2057
Additional Information 1:    1228
Additional Information 2:    1228d4fe9c043357740d22634c2788ca
Additional Information 3:    f1f5
Additional Information 4:    f1f54ef6bff428f815975b664dfbfac9

Extra information about the problem
Bucket ID:    d20f2b0ee2f6e62ad83a0fef7225caa6 (1745725326646168230)

RE lastexception - a new one appears to be generated for every crash. This is the latest:

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>eb092a0790a7b0486943ed14</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-12-18 12:02:02</createtime><buildsignature>Local.Unknown.Unknown.1.120.117.1030-1.200.000.685.Release</buildsignature><categoryid>tunable.py:1249</categoryid><desyncid>eb092a0790a7b0486943ed14</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Exception in a tunable callback for variable _components in instance class &lt;class 'sims4.tuning.instances.object_Food_IceCream_StracciatellaGelato'&gt;. (SystemError: unknown opcode)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 179, in wrapper&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 167, in c_api_server_init_tick&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\core_services.py", line 164, in start_service_tick&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\service_manager.py", line 346, in start_single_service&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 192, in update_incremental_start&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 263, in _execute_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 724, in invoke_registered_callbacks_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 768, in _invoke_tunable_callbacks&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 446, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 1261, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 636, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 1518, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 446, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 1728, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 446, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 890, in invoke_callback&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\tunable.py", line 1249, in invoke_callback&#13;&#10;SystemError: unknown opcodertim=0&#13;&#10;Client Session Time: 21.96&#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: 13,616,1,6133&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4080  32.0.15.9144, GUID: CBFC90EC-C808-11F0-BBE2-047C165791D5&#13; &#10;</desyncdata></report>
<report><version>2</version><sessionid>eb092a0790a7b0486943ed14</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-12-18 12:02:03</createtime><buildsignature>Local.Unknown.Unknown.1.120.117.1030-1.200.000.685.Release</buildsignature><categoryid>posture_state_spec.py:44</categoryid><desyncid>eb092a0790a7b0486943ed14</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Error during initialization of service tuning_instance_manager. This will likely cause additional errors in the future. (SystemError: error return without exception set)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 283, in _execute_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 304, in _execute_func_and_calculate_time&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_instance_manager.py", line 50, in on_start&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_instance_manager.py", line 105, in _use_animation_constraint_cache&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\animation_ac_cache.py", line 160, in read_ac_cache_from_resource&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\animation_ac_cache.py", line 176, in _merge_cached_constraints&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\postures\posture_state_spec.py", line 44, in __new__&#13;&#10;SystemError: error return without exception setrtim=0&#13;&#10;Client Session Time: 21.96&#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: 13,616,1,6133&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4080  32.0.15.9144, GUID: CBFC90EC-C808-11F0-BBE2-047C165791D5&#13; &#10;</desyncdata></report>
<report><version>2</version><sessionid>eb092a0790a7b0486943ed14</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-12-18 12:04:48</createtime><buildsignature>Local.Unknown.Unknown.1.120.117.1030-1.200.000.685.Release</buildsignature><categoryid>elements.py:1077</categoryid><desyncid>eb092a0790a7b0486943ed14</desyncid><systemconfig/><screenshot/><desyncdata>Exception in Sim Timeline: Exception running Element (AttributeError: 'cell' object has no attribute '_element_handle')&#13;&#10;Traceback (most recent call last):&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\scheduling.py", line 231, in simulate&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\elements.py", line 1077, in _run&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\scheduling.py", line 461, in run_childAttributeError: 'cell' object has no attribute '_element_handle'rtim=0&#13;&#10;Client Session Time: 21.96&#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: 13,616,1,6133&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4080  32.0.15.9144, GUID: CBFC90EC-C808-11F0-BBE2-047C165791D5&#13; &#10;</desyncdata></report>
<report><version>2</version><sessionid>eb092a0790a7b0486943ed14</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-12-18 12:05:03</createtime><buildsignature>Local.Unknown.Unknown.1.120.117.1030-1.200.000.685.Release</buildsignature><categoryid>interaction.py:3891</categoryid><desyncid>eb092a0790a7b0486943ed14</desyncid><systemconfig/><screenshot/><desyncdata>[rez] Posture graph threw an exception while being queried by autonomy: (TypeError: unsupported operand type(s) for &: 'int' and 'Metaclass')&#13;&#10;Traceback (most recent call last):&#13;&#10;Caught and logged:&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\objects\base_interactions.py", line 445, in _constraint_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\objects\base_interactions.py", line 389, in _get_tested_aops&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\aop.py", line 166, in test&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\base\interaction.py", line 2802, in test&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\base\interaction.py", line 3891, in get_participants&#13;&#10;TypeError: unsupported operand type(s) for &: 'int' and 'Metaclass'rtim=0&#13;&#10;Client Session Time: 21.96&#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: 13,616,1,6133&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4080  32.0.15.9144, GUID: CBFC90EC-C808-11F0-BBE2-047C165791D5&#13; &#10;</desyncdata></report>
</root>

Batkrook92​  Do you get a lastexception with every crash, or just some of them?  I will ask around about this LE itself (I recognize it but don't know exactly what causes it), but it would be good to know from your end whether it's always associated with these crashes or only sometimes.

Your dxdiag doesn't list any Sims 4-related errors, but given your high-end processor, you might be getting the type of crash that happens frequently on this CPU.  Since the first troubleshooting step for this is to update the BIOS for your motherboard, and it's good to do this anyway, please try that first.  I believe this is your board:

https://www.msi.com/Motherboard/PRO-Z790-P-WIFI/support

But double-check the model number of the board itself before downloading anything.  I also can't see whether you already have the newest BIOS because the support site lists them differently than the dxdiag, but hopefully the system will report a version that matches something on the site.

If this doesn't help, and the game crashes again, please look for new errors in the Reliability Monitor.  Click Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day.  Today is on the right.

Look for an error that happened at exactly the time of your most recent Sims 4 crash.  If you find one, double-click it to see more details, then copy that info and paste it into a reply here.  If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.

Thank you - dxdiag attached!

Here is the lastexception:

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>1280270bb7bf313d69402442</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-12-15 15:08:27</createtime><buildsignature>Local.Unknown.Unknown.1.120.117.1030-1.200.000.685.Release</buildsignature><categoryid>posture_state_spec.py:47</categoryid><desyncid>1280270bb7bf313d69402442</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Error during initialization of service tuning_instance_manager. This will likely cause additional errors in the future. (SystemError: unknown opcode)&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 283, in _execute_gen&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Core\sims4\tuning\instance_manager.py", line 304, in _execute_func_and_calculate_time&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_instance_manager.py", line 50, in on_start&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_instance_manager.py", line 105, in _use_animation_constraint_cache&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\animation_ac_cache.py", line 160, in read_ac_cache_from_resource&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\animation\animation_ac_cache.py", line 176, in _merge_cached_constraints&#13;&#10;  File "T:\InGame\Gameplay\Scripts\Server\postures\posture_state_spec.py", line 47, in __new__&#13;&#10;SystemError: unknown opcodertim=0&#13;&#10;Client Session Time: 22.19&#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: 13,614,2,6133&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4080  32.0.15.9144, GUID: CBFC90EC-C808-11F0-BBE2-047C165791D5&#13; &#10;</desyncdata></report>
</root>

Batkrook92​  Please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

One cause of the "failed to launch game" error is trying to launch it after it's crashed and without restarting your computer first, in case that's relevant.

The lastexception and lastcrash files didn't attach, likely because this site flags them due to the first line of text.  I can't actually do anything with a lastcrash, but if you want to provide a lastexception, you can delete that first line and try to attach it again.  Or you can copy the text of the file and paste it into a reply.