How to get PV-Wave to exit automatically when no license

[User Name <user(at)bar.foo>]

Greetings:

I have an application that kicks off a PV-Wave application. If all of
the licenses are in use, I would like PV-Wave to exit immediately
instead of asking interactively if the user wants to wait for a
license. Since this is a graphical application with no associated
console window there is no way for the user to answer the question so
the PV-Wave application just hangs in the background.

Are there any secret command line arguments or environment variables
that can accomplish this?

Thanks,
Mark