Hi,

We declare couple UltraTabPageControl variables as shown below:

private UltraTabPageControl ultraTabPageDetail;

private UltraTabPageControl ultraTabPageDetail;

private UltraTabPageControl ultraTabPageModify;

...

However, intermittently the code crashes when we set the Selected property to true like the following:

this.ultraTabPageDetail.Tab.Selected = true;

and here is the stack trace:

[6:14:19 PM(IniTabContents)][Source  --> Infragistics4.Win.UltraWinTabControl.v11.2]    TargetSite  -->Void OnManagerSelectedTabItemChanged(System.Object, SelectedTabItemChangedEventArgs)StackTrace  -->   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.OnManagerSelectedTabItemChanged(Object sender, SelectedTabItemChangedEventArgs e)    at Infragistics.Win.UltraWinTabs.TabManager.set_SelectedTabItem(ITabItem value)    at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.SetSelectedTab(UltraTab tab)    at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.set_SelectedTab(UltraTab value)    at Infragistics.Win.UltraWinTabControl.UltraTab.set_Selected(Boolean value)    at Eclipsys.SunriseXA.ClinDoc.DocReview.UI.DocDetailsMain.InitTabContents()

Any ideas what would have caused the problem to occur?  Thanks.