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

[maria graziar10075262]

i'm making a simple game and i'm still learning as3 I want to go at the next frame but  get the null error. it is a maze game.

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

  at Senzanome_9_Scena1_fla::MainTimeline/stage_onEnterFrame()

here is the code

stop ();

next.visible=false;

var rightArrow:Boolean = false;

  var leftArrow:Boolean = false;

  var upArrow:Boolean = false;

  var downArrow:Boolean = false;

  var speed:int = 5;

  stage.addEventListener(KeyboardEvent.KEY_DOWN, stage_onKeyDown);

  stage.addEventListener(KeyboardEvent.KEY_UP, stage_onKeyUp);

  stage.addEventListener(Event.ENTER_FRAME, stage_onEnterFrame);

  function stage_onKeyDown(event:KeyboardEvent):void {

  if(event.keyCode == Keyboard.RIGHT) rightArrow = true;

  if(event.keyCode == Keyboard.LEFT) leftArrow = true;

  if(event.keyCode == Keyboard.UP) upArrow = true;

  if(event.keyCode == Keyboard.DOWN) downArrow = true;

  }

  function stage_onKeyUp(event:KeyboardEvent):void {

  if(event.keyCode == Keyboard.RIGHT) rightArrow = false;

  if(event.keyCode == Keyboard.LEFT) leftArrow = false;

  if(event.keyCode == Keyboard.UP) upArrow = false;

  if(event.keyCode == Keyboard.DOWN) downArrow = false;

  }

  function stage_onEnterFrame(event:Event):void {

  var rect:Rectangle = player.getBounds(this);

  var i:int = 0;

  var xBump:int = 0;

  var yBump:int = 0;

  if(rightArrow) {

  xBump = speed;

  for(i = 0; i < speed; i++) {

  if(maze.hitTestPoint(rect.right + i, player.y, true)) {

  xBump = i - 1;

  break;

  }

  }

  }

  if(leftArrow) {

  xBump = -speed;

  for(i = 0; i < speed; i++) {

  if(maze.hitTestPoint(rect.left - i, player.y, true)) {

  xBump = -i + 1;

  break;

  }

  }

  }

  if(upArrow) {

  yBump = -speed;

  for(i = 0; i < speed; i++) {

  if(maze.hitTestPoint(player.x, rect.top - i, true)) {

  yBump = -i + 1;

  break;

  }

  }

  }

  if(downArrow) {

  yBump = speed;

  for(i = 0; i < speed; i++) {

  if(maze.hitTestPoint(player.x, rect.bottom + i, true)) {

  yBump = i - 1;

  break;

  }

  }

  }

  player.x += xBump;

  player.y += yBump;

  pickUp();

function pickUp (){

  if (player.hitTestObject(coin1)) {

  coin1.x=1000

  }

  if (player.hitTestObject(coin2)) {

  coin2.x=1000

  }

  if (player.hitTestObject(coin3)) {

  coin3.x=1000

  }

  if (player.hitTestObject(coin4)) {

  coin4.x=1000

  }

  if (player.hitTestObject(coin5)) {

  coin5.x=1000

  }

  if (player.hitTestObject(coin6)) {

  coin6.x=1000

     {next.visible = true;}

  }

}

}

next.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_10);

function fl_ClickToGoToAndStopAtFrame_10(event:MouseEvent):void

{

  gotoAndStop(3);

}

[maria graziar10075262]

I run the movie in debug mode and found the following point that causes that error :

if(maze.hitTestPoint(rect.left - i, player.y, true)) {

  xBump = -i + 1;

  break;

  }

Could you please help me to solve this problem?

Thanks for all help

• Thousands of TypeError: Error #1009:..... (where is the error??)

[nezarov]

I think that "maze" movie clip is not visible to the main timeline, did you add it in another movie clip?

[maria graziar10075262]

no..  I create a maze at frame 1 and now i want to go at the next frame, but i can't.
what can i do?

[nezarov]

Remove the enter frame event listener:

function fl_ClickToGoToAndStopAtFrame_10(event:MouseEvent):void

{

stage.removeEventListener(Event.ENTER_FRAME, stage_onEnterFrame);

  gotoAndStop(3);

}

[nezarov · Accepted solution]

Or remove it at this point:

  if (player.hitTestObject(coin6)) {

stage.removeEventListener(Event.ENTER_FRAME, stage_onEnterFrame);

  coin6.x=1000

     next.visible = true;

  }

That will be better.

[maria graziar10075262]

thaanks now it's works

Grazie mille

[nezarov]

You're welcome