Room boundary from different links

Revit
,
1

Hello,
I was trying to get room boundary from my linked file(1912_AR03_Central) and create filled region from each room boundaries,

However, I can only get part of the boundary from the architecture file(1912_AR03_Central).
It can’t get the boundary from the structure file(1912_ST03_Central) so the room boundaries can’t create closed polyline to form filled region…

Filled region from Link_File
Filled region from Link_File1446×755 192 KB

Is there anyway I can do?

2

see if that helps…

3

Well, it performs the same as I’ve written though,
It doesn’t get the closed room boundary…

Unclosed_room_Boundary
Unclosed_room_Boundary1545×586 32 KB