Game Crash on Second Launch

@bobbyb897  It sounds like one or more mods are the problem here.  The next time the game won't open, just remove the Mods folder and see what happens.  If it loads, use the 50/50 method to sort through your mods:

https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method

Hello, I just tried deleting the mod folder and relaunching and it will not launch.

@bobbyb897  What antivirus do you use?  Is OneDrive active, and if so, is it syncing the contents of Documents?  Here's how to check the settings:

https://support.microsoft.com/en-us/office/choose-which-onedrive-folders-to-sync-to-your-computer-98b8b011-8b94-419b-aa95-a14ff2415e85

Please also let me know whether you run into the same issue if you never add mods in the first place.

I think I just use the default windows 10 antivirus. I do not have Norton or any additional software.

I just deactivated One drive and reset the game files again and I seem to be having the same problem.

If I never add mods in the first place I do not have an issue I think. If I add mods it works initially and then I can't get it to work after that (even if I remove the mods).

@bobbyb897  It sounds like you'll need to test your mods.  It's a bit more complicated since the game launches once, but you can set aside your current Sims 4 user folder and just experiment on a new one.  Use the 50/50 method to sort through the mods.

https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method

I think I have been trying to use the 50/50 method but I do not think it is working as the same thing happens where it works the first time and then crashes thereafter.

@bobbyb897  If the game works the second time you launch it when you never use mods, but it doesn't work the second time you launch it when you do add mods, then the problem is probably at least one of the mods.  But you can test this by adding only a freshly downloaded mod that's confirmed compatible with the game's current patch level, for example MCCC or one of TwistedMexi's mods.  If you see the same error, then we can look elsewhere.

Please test in a(nother) clean user folder, just to be thorough.

The reason I asked about an antivirus is that this kind of problem is not all that uncommon, although usually the game is affected and not the mods.  The idea is that an antivirus detects the mods' effects or maybe just that they're added to Documents and blocks the files in a way.  So if adding a fresh, fully updated mod, and nothing else, produces the same problem, please look through the Task Manager's background processes list for anything that looks like it might belong to an antivirus.

Hello, I have been messing around with the sims 4 folder to see what causes the error on my second launch and I think it is the lastcrash file. Whenever I delete the file and relaunch it doesn't crash on startup. I was wondering if there was a way to read this file to see what exactly is causing the issue?

Hello, sorry it was the lastexceptions file not the lastcrash file.

@bobbyb897  The presence of a lastexception shouldn't stop the game from loading.  But if you want to know what it's complaining about, you could ask on the MCCC Discord.  The helpers there have bots to parse the info and can step in to provide additional insight or clarification.