When you execute a VLF-ONE application with Developer=YES on the URL, the creation and destruction of some major objects is tracked.
When a major object's uTerminate method is invoked, a delayed check is started to verify that the object's DestroyInstance event subsequently fires.
In other words, executing an object's uTerminate method implies that it should be subsequently destroyed.
If the DestroyInstance event is not fired, you may see a message like this: