Does this really only happen when a .T runs from a PLN, as opposed to a suite, .S file?
Searching the SilkTest folders finds no instance of this call, so I'm assuming it's a builtin call, but I would think if it happens between every case it would be part of DefaultTestCaseExit.
Reason I ask is that I've been working around a resource leak in this product for a long time, and this might help "plug" it (if the prob is that the call is never made because I don't use the organizer).
This would be better than running from command line to insure agent.exe gets killed between scripts.
...a bit skeptical this will work as I think Segue would have had me try this already, but stay tuned.