TypeError: Error #1009: Cannot access a property or method of a null object reference.

[MissShoujo]

package 

{

  import flash.display.MovieClip;

  import flash.events.Event;

  import flash.utils.Timer;

  import flash.text.TextField;

  import flash.text.TextFormat;

  public class Game extends MovieClip

  {

  static var boat:MovieClip;

  static var enemyShipTimer:Timer;

  static var scoreText:TextField;

  static var score:Number

  static var healthMeter:HealthMeter;

  static var gameOverMenu:GameOverMenu;

  static var powerUpTimer:Timer;

  static var miniBossTimer:Timer;

  static var bossCountDown:Number;

  public function Game()

  {

  Key.initialize(stage);

  boat = new Boat();

  addChild(boat);

  boat.shield.visible = false;

  bossCountDown = 3;

  boat.x = 300

  boat.y = 150

  enemyShipTimer = new Timer(1000);

  enemyShipTimer.addEventListener("timer", sendEnemy);

  enemyShipTimer.start();

  miniBossTimer.start();

  var scoreFormat = new TextFormat("Calabri MS", 20, 0XFFFFFF);

  scoreText = new TextField();

  scoreText.defaultTextFormat = scoreFormat;

  scoreText.x = 290;

  scoreText.text = String(0);

  addChild(scoreText);

  healthMeter = new HealthMeter();

  addChild(healthMeter);

  healthMeter.x = 10;

  healthMeter.y = 10;

  gameOverMenu = new GameOverMenu();

  gameOverMenu.x = 300;

  gameOverMenu.y = 150;

  addChild(gameOverMenu);

  gameOverMenu.visible = false;

  gameOverMenu.playAgainButton.addEventListener("mouseDown", newGame);

  powerUpTimer = new Timer(10000);

  powerUpTimer.addEventListener("timer", sendPowerUp);

  powerUpTimer.start();

  miniBossTimer = new Timer (20000);

  miniBossTimer.addEventListener("timer", sendMiniBoss);

  miniBossTimer.start();

  resetScore();

  }

  function sendMiniBoss(e:Event)

  {

  miniBossTimer.stop();

  if(bossCountDown ==0)

  {

  var boss = new Boss();

  stage.addChild(boss);

  bossCountDown = 3;

  }

  else

  {

  var miniBoss = new MiniBoss();

  stage.addChild(miniBoss);

  bossCountDown -= 1;

  }

  }

  function sendEnemy(e:Event)

  {

  var enemy = new EnemyShip();

  stage.addChild(enemy);

  }

  function sendPowerUp(e:Event)

  {

  var powerUp = new PowerUp();

  stage.addChild(powerUp);

  }

  static function updateScore(points)

  {

  score += points;

  scoreText.text = String(score);

  }

  static function resetScore()

  {

  score = 0;

  scoreText.text = String(score);

  }

  function newGame(e:Event)

  {

  gameOverMenu.visible = false;

  boat.visible = true;

  boat.x = 300;

  boat.y = 150;

  boat.takeDamage(-boat.maxHealth);

  boat.addEventListener("enterFrame",boat.move);

  resetScore();

  enemyShipTimer.start();

  }

  static function gameOver()

  {

  gameOverMenu.visible = true;

  enemyShipTimer.stop();

  miniBossTimer.stop();

  for(var i in EnemyShip.list)

  {

  EnemyShip.list.kill();

  }

  }

  }

}

[MissShoujo]

Says line 35 is the issue?

[nezarov · Accepted solution]

You only need to remove the line 35: miniBossTimer.start();

because it cannot be started with null values..