(LabView 7.1) I have a tab control with subpanels. When the sub-VI associated with a given subpanel is called *and* the tab is not exposed, nevertheless often (not always) the subpanel contents appear on the currently visible tab. Apparently this requires that the control on the sub-VI front panel (e.g. a graph) is not only updated, but also that its properties are manipulated. The enclosed demo shows this behaviour (make sure that the path is correct for loading the sub-VI "Test SubPanel Visibility Sub-VI.vi" in "Test SubPanel Visibility.vi"). Thus, when "Refresh Graph" is activated with subpanel "Page 2" visible and "Modify Graph" false, all is well. If, instead, "Modify Graph" is true (which enables property node modification in the sub-VI), then the graph in the subpanel "Page 1" typically shows through.
Thanks for any help,
Lyle