Kepler

In some of my workflows, I have an actor that checks that certain components are installed and working before trying to run the workflow. If things are missing, it uses the Throw Exception actor to stop execution and display an error message. Right now, it's possible for the director to schedule the entire workflow before the error check, even if I use the "check" actor as a trigger. I just want some way to convince the director that needs to fire the Throw Exception actor before the rest of the workflow.