curtain wall corner

[Anonymous]

another question for the curtan wall tool

why when I use magic method (boundary slab) and it indeed
creat cyrtain wall in circumference...but look at the corner!
abd missing the upper frame...why?

I know and tried to read before asking...
I know I can do "creat common frame " command...but it doesnt work here

[Anonymous]

Few possible reasons:
-multiple overlapping lines in this area.
-this segments have been manually deleted