This test returns a failure for any Close Reference function wired to a GObject reference. The GObject class contains Panel and Diagram, along with any object that can reside on a panel or diagram (control, constant, node, structure, wire, terminal, etc.)
As I explain in Brainless LabVIEW, there is no need to close GObject references. In fact, the function itself is a no-op when a GObject reference is wired.
This test is saved in LabVIEW 2015. Follow the instructions here to install and use this test.