Use attached to reproduce.
Workaround:
public RadForm1()
{
InitializeComponent();
radPdfViewer1.ContainerElement.BookmarksTree.SelectedNodeChanged += BookmarksTree_SelectedNodeChanged;
}
private void BookmarksTree_SelectedNodeChanged(object sender, Telerik.WinControls.UI.RadTreeViewEventArgs e)
{
Telerik.Windows.Documents.Fixed.Model.Navigation.BookmarkItem bookmark = e.Node.Tag as Telerik.Windows.Documents.Fixed.Model.Navigation.BookmarkItem;
if (bookmark != null && bookmark.Destination == null)
{
GoToAction goToAction = bookmark.Action as GoToAction;
if (goToAction != null && goToAction.Destination != null)
{
radPdfViewer1.PdfViewerElement.GoToDestination(goToAction.Destination);
}
}
}