[mattyokan]

Originally Posted by Yildirim

DriveTrain(subsystem):
package org.usfirst.frc6429.NewDimension.subsystems;

import org.usfirst.frc6429.NewDimension.RobotMap;
import org.usfirst.frc6429.NewDimension.commands.*;

import edu.wpi.first.wpilibj.Joystick;
import edu.wpi.first.wpilibj.RobotDrive;
import edu.wpi.first.wpilibj.SpeedController;
import edu.wpi.first.wpilibj.VictorSP;

import edu.wpi.first.wpilibj.command.Subsystem;


/**
*
*/
public class DriveTrain extends Subsystem {

// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=CONSTANTS

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=CONSTANTS

// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS
private final SpeedController rightFrontMotor = RobotMap.driveTrainRightFrontMotor;
private final SpeedController rightRearMotor = RobotMap.driveTrainRightRearMotor;
private final SpeedController leftFrontMotor = RobotMap.driveTrainLeftFrontMotor;
private final SpeedController leftRearMotor = RobotMap.driveTrainLeftRearMotor;
private final RobotDrive robotDrive41 = RobotMap.driveTrainRobotDrive41;

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS


// Put methods for controlling this subsystem
// here. Call these from Commands.

public SpeedController getLeftRearMotor() {
return leftRearMotor;
}

public SpeedController getLeftFrontMotor() {
return leftFrontMotor;
}

public SpeedController getRightRearMotor() {
return rightRearMotor;
}

public SpeedController getRightFrontMotor() {
return rightFrontMotor;
}

public void initDefaultCommand() {
// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DEFAULT_COMMAND


// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DEFAULT_COMMAND

// Set the default command for a subsystem here.
// setDefaultCommand(new MySpecialCommand());
}

public void takeJoystickInput(Joystick Left,Joystick Right) {
robotDrive41.tankDrive(Left,Right);
}

public void stop() {
robotDrive41.drive(0,0);
}
}



Tank Drive(command):

package org.usfirst.frc6429.NewDimension.commands;

import edu.wpi.first.wpilibj.command.Command;
import org.usfirst.frc6429.NewDimension.Robot;

/**
*
*/
public class TankDrive extends Command {

// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=VARIABLE_DECLARATIONS

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=VARIABLE_DECLARATIONS

// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=CONSTRUCTOR
public TankDrive() {

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=CONSTRUCTOR
// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=VARIABLE_SETTING

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=VARIABLE_SETTING
// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=REQUIRES
requires(Robot.driveTrain);

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=REQUIRES
}

// Called just before this Command runs the first time
protected void initialize() {
}

// Called repeatedly when this Command is scheduled to run
protected void execute() {
Robot.driveTrain.takeJoystickInput(Robot.oi.getLef tJoystick(),
Robot.oi.getRightJoystick());
}

// Make this return true when this Command no longer needs to run execute()
protected boolean isFinished() {
return false;
}

// Called once after isFinished returns true
protected void end() {
Robot.driveTrain.stop();
}

// Called when another command which requires one or more of the same
// subsystems is scheduled to run
protected void interrupted() {
end();
}
}

I can not figure out what the problem is

Robot.oi.getLef tJoystick(),

That could be it?