In my current Test Stand 3.5 sequence I start by using niSE open session.vi to begin a new switch session. I then pass this handle along to other VIs for switching, which works perfectly, and then at the very end of the sequence I pass the handle to a niSE close session.vi. The problem I'm having is now I want to start using the built in IVI-C Switch steps. Everytime I insert one of these steps in the middle of my sequence I get an error because the step appears to be trying to open a new session, when one is already open. Is there a way to pass the currently running session handle into the "virtual device name" of the switch step so that it doesn't try to open a new one?