December 2018
So, I've been experiencing a glitch where, when a sim travels to the future using the Into The Future expansion pack for Sims 3, no sim comes out the other side, and I'm left with an empty UI and no way to progress. I've spoken to EA Tech Support, they're not sure what's up either, but are looking into it, and recommended I post about it here also, so the community could take a look at it.
I've seen a few others posting about similar issues involving loading-screen inducing travel, but nothing this specific to my issue, as far as I've seen.
I haven't tested every household in my save, but I know I've gotten at least one sim for another household to go through the portal successfully. Any idea's ya'll? I'm willing to try almost anything at this point.
December 2018
@Kimichan95 The travel transition is fragile and breaks easily, which is what you're seeing. Without mods, the only thing you can do is lower the demands on the game engine as much as possible and hope for the best. Now's also a good time to make a copy of your save file, if you haven't already; that way you'll have a backup in case you need it later.
Here's how to lower the stress on the game and give your sim the best chance of arriving safely:
All this gives your game the best chance of getting through the travel transition intact. But if it still breaks, there's not much else you can do without mods. I don't know if you'd be interested in going that route, though.
P.S. There's no one working on this issue at EA. The game has been out of development for five years now, and no fixes are forthcoming.