Mullion problem between two curved curtain walls

[AZlatev]

Hi guys, I need some help in here. I'm trying to make one continues curtain wall, made up from two different curved (arc based) curtain walls. The problem is in mullions between two of them. They won't connect together automaticaly and I don't have the left "Toggle mullion Join" icon, so I can't join them manually. Any ideas how to prevent that gap ?

[Steve_Stafford]

Corner Mullion types are meant to deal with connections between the ends of curtain walls. Have a look at the different types and see if you can tweak them to get the condition you are hoping for.

[AZlatev]

Yes, but the problem is that I'm using a special profile for my mullion and I can't use it with corner mullion. I thing is that sometimes is working and sometimes it doesn't(as shown in the attachment). Still looking for some ideas.