join oblique wall with a vertical

[mcanonic]

Hello everyone
and apologize for my insistence, but I'm at first. as you can see from the annex, I have in the pientine a couple of oblique walls. retrying and reproducing, I was able to perfectly merge the oblique wall (45 degrees) with the other two (rectangle and horizontal).
I don't know well why, but taking back the same steps made before, I can't reproduce the same result on the other piece of wall.

When do you know what I can do? Is there an otion "unisci mura"?

Thank you.
m

 

[DarthVader]

si c'è raccorda

 

[mcanonic]

si c'è raccorda

Thank you! just to help someone who is in my own situation, mark that in my archicad, the command is called "interseca" ("gather" I didn't find it).

Thank you.
m