I'm using Archicad 11 and the Window entitled "W Round Fix 11" (this problem also occurs for "W Round Piv 11").
I insert the window at 8'-0" with "Header to Story 1". This should set the top of this round window at 8'-0". However, after I've inserted the window and open it, the Header Heighth is now 4'-8" for a 3'-4" wide window. This problem has to do with the "B" value equaling the "A" value. The reason I know this is because I'm working on making my own round window. The header heighth works fine until the B value is set internally to be the same as the A value. This is what makes the Header Heighth wrong.
This obviously needs to be fixed. The Header value should still work and stay the same as what the user puts in to begin with i.e. if I put in 8'-0" as the Header Height, the HH should stay at 8'-0" until I change it to something else.
Thanks.