[Russ Beavis]

I should have added the suggestion from Chaos in a Can to my earlier post. That's a VALUABLE lesson in LabVIEW development (and, I'd imagine, any multi-threading application that needs to share time in an OS).

You should always make sure that loops only execute at a reasonable rate. Without adding an intentional delay within a while loop or using a timed loop (which does this for you), the loop will execute at max speed and cause the OS and CPU to max out.

As an example, create a simple while loop with only an increment and display and then run it. You'll find that it will execute at a few MHz and cause your PC to slow down tremendously. Add a 1ms wait in the loop to force it to execute at 1kHz and everything will be fine.

Russ