Double Door Crash

[Sabre]

Very specific problem this. I'm remaking Resident Evil. I added double doors, but they wouldn't close. I added a IO to make them open together, that works, but when I try and make them close, HL2 locks up. Even force close doesn't work.

[Shana]

There should be a "Linked door" keyvalue somewhere that forces them to open/close together.