Is there any way to show vi's called by reference in the hierarchy window

[Robert Stephen]

I've inherited some code and in order to save memory and system resources at run time it calls several vi's by reference rather than including them as sub vi's.

Howver I would like to use the hierarchy window to get a more general overview of how the system works but the vi's called by reference don't show up here. Is there any easy way of finding out how all the parts interconnect?

[JeanPierre]

VIs called by reference should appear in the hierarchy window but not under the caller icon. They appear at the top line of VIs.
If you are sure that a VI is in memory and it does not appear in the Hierarchy window, this VI has been marked as "System VI". Such a VI won't appear on the Hierarchy window or on the application property "VIs in memory".