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EnvelopeGenerator.Form/Helper/RefreshHelper.vb

@@ -143,6 +143,9 @@ Public Class RefreshHelper
     End Sub
 
     Public Sub LoadVisibleIndex()
+        If visibleRowIndex = GridControl.InvalidRowHandle Then
+            Exit Sub
+        End If
         view.MakeRowVisible(view.FocusedRowHandle, True)
         view.TopRowIndex = view.GetVisibleIndex(view.FocusedRowHandle) - visibleRowIndex
     End Sub