@escapedpolarbear It sounds like their house might have been left "open" by the game, meaning your sims are allowed access, as if they'd been greeted and invited inside. Can you send one inside the house? You might then form a group and choose to go somewhere else without having to officially "visit" the house again.
If you can't get inside the house either, quit and then delete the five cache files in your game folder in Documents. For reference, they are:
CASPartCache.package
compositorCache.package
scriptCache.package
simCompositorCache.package
socialCache.package
If you still can't visit after reloading the game, you might need to evict the Langeraks and move them back in. If you do this in one Edit Town session, without saving the family to the bin, they'll keep their jobs and relationships. If this doesn't help either, try evicting them, saving their house alone to the bin, bulldozing the lot, replacing it with the bin copy, and moving them back in, again all in one Edit Town session.
By the way, if they don't have enough money to move back into their house (it happens), you can place them somewhere else temporarily (or quit without saving), and give them more money using the familyfunds cheat. Open the cheat console (crtl-shift-c) and enter "familyfunds Langerak 10000" without quotes. (Pick whatever number you want.)
