[SuperBK]

You are missing the line
myRobot(1,2)
Under
RobotDemo(void):

and above
feeder(5, Relay::kForwardOnly)

That initializes the robot drive and the feeder

class RobotDemo : public SimpleRobot
{	
	RobotDrive myRobot; // robot drive syste0m
	Relay feeder;
	
public:
	RobotDemo(void):
                           myRobot(1,2),
		feeder(5, Relay::kForwardOnly)

	void OperatorControl(void)
	{
		while (IsOperatorControl()){
			
	
		           feeder.Set(Relay::kForward);
		}
	}