ListCollectionView CancelEdit throws exception

I have a page. It has a ListCollectionView property. The property is initialized in the ctor via input args before the call to InitializeComponent(). I want to edit the current item. I call MyLcv.EditItem(MyLcv.CurrentItem). To accept changes, I call MyLcv.CommitEdit(). It works. To cancel changes, I call MyLcv.CancelEdit(). This throws an InvalidOperationException, saying "CancelEdit is not supported for the current edit item." Any Ideas?

Bill

Bill Swartz