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Apparently this test gives incorrect warnings if an input tunnel of an event structure is unwired on the inside. It seems to be a bug in LabVIEW (???) that with this kind of tunnel the property "UseDefault" is by default set to "TRUE" which doesn't make sense for input tunnels. For a case structure this property is always "FALSE" on input tunnels but something is wrong with event structures. I would suggest to add a check to your test to see whether the inner terminal is a sink or a source. This way input tunnels can be ignored. I can't update your llb since I don't have LabVIEW 2012.