Game randomly crashes when tabbing out

Alright I'll try disabling it first before taking it out. 

GabrielRexiel​  Disabling progression should be enough to prevent it from hogging resource use in a new world.  In fact, in a world you haven't loaded before, you should get a notification asking whether you want to enable SP.  The one reason not to remove it is that saving without it present will delete all the settings you've imposed, so it's better to just disable it if you might want to add it back later.

If you'd like help disabling more stories, that's more a question for the NRaas site.  But I do believe there's a toggle to disable all stories; the only issue is it can take up to one cycle of SP for the stories already in the queue, so to speak, to run out.  So it might appear that the setting isn't working.

But it's your choice whether to keep using it.  And you could also export its settings (through SP itself or through Overwatch) if you want to try with SP gone but would like to add it back and have the option to impose the same settings later.

Ohh I do have story progression installed. Maybe had it on when I first ran into the issue. It's a mod I'm not fully happy with though. I feel like I get a lot of annoying notifications even after trying to turn them off lol. Or maybe not a lot but for me it can be quite disruptive. And it did feel like a hassle to set things up. I might just take it out and try without it tbh. Especially now that I know it can make the issues worse.

GabrielRexiel​  The problem is that the game starts to load the new world before it's released all the resources from running the old one.  That's why it helps to lower in-game settings, and to quit and reload before and after traveling.  This is often not necessary, especially in a newer save or when only a few expansions are installed/enabled, but neither of those is helpful for an existing save with most of the content, of course.  Still, leaving the interactive loading screen disabled is easy enough, and you can also decline to sign in at the Main Menu, and put the EA App in offine mode.

I STILL want to know whether you're running NRaas StoryProgression though, and if so, with which add-ons.  Unlike other NRaas mods, SP increases the game's demands, sometimes considerably on higher speeds or when it's first enabled.  If you are using SP and don't want to remove it, try disabling progression in the new world; when you reenable it, leave it on the slowest setting.

What I'm gathering is that there's not much more I can do for stability. I was kinda hoping for a fix but I've got it pretty much as stable as it can be. I could play the save after traveling. Was just hoping I wouldn't need to reload a save because the loading times are so long. When it comes to what mods I have I have a handful of nraas mods as well as a mod that skips the intro.

GabrielRexiel​  The travel transition is much more reliable with Traveler installed (and hopefully ErrorTrap and Overwatch are installed too), but it's not foolproof.  When you disabled the interactive loading screen, you lowered the demands on the game engine, which helps too.  The other major step in this vein is quitting and reloading right before you want your sims to travel—resource use increases as you're playing, so it's lowest, relatively speaking, right after you've loaded the save.  Some players also need to save (use "save as" so you don't overwrite the save) after arriving in the new world and before playing forward.

If you can't get the new world not to crash even when reloading both before and after the travel transition, please try a different world.  And I'd still like to know about your other mods.

Switching to windowed temporarily could be the most simple fix. Didn't even think about it so thanks. :) Might look into the other options too. 

I had the crashing while traveling once. It happened mid loading screen while loading the destination. But that seems to be fixed by disabling the interactive loading screens and doing a reset using master controller before I travel. The new issue is the game crashing after loading into the destination and I've waited for a couple of minutes. 

GabrielRexiel​  The Smooth Patch has a Borderless option, and the Sims 3 Settings Setter may as well.  (I haven't installed it to check, but the developer of the Smooth Patch says it does most of the same things, only better.)  There's also a free utility called Windowed Borderless Gaming that works well with Sims 3.

Older games often don't respond well to alt-tabbing in fullscreen mode.  It's just a limitation of how they were made and can only be worked around, not fixed.  If you don't want to use any of the Borderless options, I would suggest flipping to windowed mode before you switch apps.

For the crashing, does it happen during the travel transition, or after the world has fully loaded and you've started playing again?  Are these worlds you've played before, and crucially, have you played them before with all your current mods installed?  For example, if you add NRaas StoryProgression to a save that hasn't seen it before, SP will do a lot of extra work initially trying to rearrange certain details; this applies to any new world you load too.

Please also list all the mods you have installed, and let me know whether it helps to quit and reload just before your sims travel, so the game hasn't been running long when it loads the new world.