[Bill_B]

There are indicator LEDs on each of the solenoid coils. There are also indicators for each of the 8 channels on the solenoid breakout in the cRIO. If they are all going green, solidly, then I'd guess the wiring and programming are correct. You can also try manual activation of the valve(s) by pushing the blue "button" on the valve. If nothing happens when you do that, there is an air circuit problem.