@14c697a6e1d69acb You don't need to and shouldn't try to open mods. They're installed in .package form, and the game can read them fine. Here are install instructions:
http://modthesims.info/wiki.php?title=Game_Help:Installing_Sims_3_Package_Files/Setup_and_Files
In addition to NRaas Traveler, add ErrorTrap, Overwatch, MasterController, and Register. Be sure to delete the five cache files in your Sims 3 user folder as well:
- CASPartCache.package
- compositorCache.package
- scriptCache.package
- simCompositorCache.package
- socialCache.package
Load the save, let the game clock run for a few sim-minutes, click on the admin building (this stands in for City Hall in the University world), and select:
NRaas > MasterController > Town Options > Reset Everything
When the reset is done, let the clock run for a few more sim-minutes, then use "save as" to rename the save, so the original remains intact under its old name. Quit to desktop, delete the cache files again, reload, and see whether your sim can make it home.
If that alone doesn't help, try to lower the stress on the game engine as much as possible:
- Empty out your sim's inventory as much as is reasonable. Having a few items is fine, but not much more.
- Save the game immediately before you want your sims to travel.
- Exit to the Main Menu and lower all the graphics settings to the minimum. Turn off the in-game shopping experience and the interactive loading screens as well, then quit to desktop.
- Delete the five cache files in your user folder (listed above) again.
- Take your computer completely offline. You can sign into Origin and put it in offline mode before disconnecting your computer and launching the game.
- Load the game let your sim (try to) return home.
If none of this helps, you could share your save by zipping the folder (right-click, select Compress) and uploading it to a free filesharing site like Google Drive or Dropbox. Then either post the link here or send me a private message. I'll take a look.
If you do send me the save, please list all the expansion and stuff packs you currently have installed as well as the Store worlds. I own everything except Katy Perry, so other than that, I can mimic your setup.