[Chris Hibner]

Have you tried recreating the problem using a tether cable? This should tell you if it is a radio problem or not.

What is controlling the valve? Is it actuated automatically via some routine in your code, or is it controlled when one of the drivers presses a switch?

If it is a switch control through the OI, you might consider adding a debounce to the switch. In other words, make your code require X number of consecutive samples before it changes the relay state. For instance:

    // debounce closing the claw
    if (!closeClaw)
    {
        if (closeClawSwitch == ON)
        {
              closeClawDebCount++;
        }
        else
        {
              closeClawDebCount = 0;
        }
        if (closeClawDebCount >= DEBOUNCE_LIMIT)
        {
            closeClawDebCount = 0;
            closeClaw = TRUE;
        }
    }
    // Debounce opening the claw
    if (closeClaw)
    {
        if (openClawSwitch == ON)
        {
            openClawDebCount++;
        }
        else
        {
            openClawDebCount = 0;
        }
        if (openClawDebCount >= DEBOUNCE_LIMIT)
        {
            openClawDebCount = 0;
            closeClaw = FALSE;
        }
    }

Where the variable closeClaw controls the digital IO pin connected to the spike that controls your Festo valve.