Whenever I try to add an UltraChart to an UltraTabControl I get an exception at runtime stating: 'Can only add an UltraTabPageControl to an UltraTabControl.' I am using version 9.1.20091.2023.
Thanks.
This appears to only happen when the hosting form's IsMdiContainer property is set to true.
i believe this issue was fixed in the past six months, although the bug report i'm looking at (#24820) was a problem with the WinForms TabControl, not the UltraTabControl. could you try downloading the latest available service release and retesting?