Error 1009, the movieClip Exist but it's null when Traced

Report · Feb 01, 2013

Hi ! Im new here, and i got a really irritating problem ,

I have a MovieClip called testCam in the 2nd frame on the stage, in testCam MovieClip i have Button, Movie Clip ect. i crating a seperated map about 27 frames, and each frame have a same MovieClip, so i made a function :

function addMovement():void{
          addEventListener(Event.ENTER_FRAME, movement);
          stage.addEventListener(KeyboardEvent.KEY_DOWN, pencet);
          stage.addEventListener(KeyboardEvent.KEY_UP, angkat);
          testCam.bag1.addEventListener(MouseEvent.CLICK, goToInventory);
}

and at each frame i just called addMovement to get a same function.

so i created all the frame, with the testCam, and called addMovement(); each frame, everything was normal, until i make a button inside the testCam Movie Clip.

I have a MC named Hoe, and a MC named Tool Box, i created button with Tool Box behind the Hoe, i think i'll be normal, because no Code on both MC, but all i get is, error1009:Error #1009: Cannot access a property or method of a null object reference.

When i use Ctrl+Shift+Enter, its point to this :

testCam.bag1.addEventListener(MouseEvent.CLICK, goToInventory);

I was check thousand times, and testCam is exist in stage, but after i put the new button there it's got error.

I try a simple experiment, i trace the testCam is null or not, and its strange, when i delete the new button there, its said testCam is exist, but after i put that new button its said testCam is null.

Please help me , sorry for my bad english.

Report · Feb 01, 2013

Where is the code and where is the object? Have you traced both the movieclip and the button inside it?

Report · Feb 01, 2013

Here is all the related code :

Movement :

function movement(e):void{
          testCam.placeText.text = placeStatus;
          //testCam.placeText.text = currentFrame;
          if(atas == true && testCam.y > 0 + testCam.height/2){
                    testCam.y -= 3;
                    myCursor.y -= 3;
          }
          if(bawah == true && testCam.y < 600 - testCam.height/2){
                    testCam.y += 3;
                    myCursor.y += 3;
          }
          if(kanan == true && testCam.x < 800 - testCam.width/2){
                    testCam.x += 3;
                    myCursor.x += 3;
          }
          if(kiri == true && testCam.x > 0 + testCam.width/2){
                    testCam.x -= 3;
                    myCursor.x -= 3;
          }
          if(cursorStatus == "Hoe"){
                    myCursor.cursorHoe.gotoAndStop(hoeLevel);
          }
          testCam.coinUI.moneyText.text = money;
          testCam.mineralUI.mineralText.text = mineral;
          dateSystem(testCam.hariText,testCam.tahunText,testCam.jamText);
          dayNight();
          energyCalculation();
          testCam.energyTank.energyText.text = energyPercent+"%";
          hungerCalculation();
          testCam.hungerTank.hungerText.text = hungerPercent+"%";
}

Pencet & Angkat Function :

function pencet(e:KeyboardEvent):void{
          if(e.keyCode == 87 || e.keyCode == Keyboard.UP){
                    atas = true;
          }
          if(e.keyCode == 83 || e.keyCode == Keyboard.DOWN){
                    bawah = true;
          }
          if(e.keyCode == 65 || e.keyCode == Keyboard.LEFT){
                    kiri = true;
          }
          if(e.keyCode == 68 || e.keyCode == Keyboard.RIGHT){
                    kanan = true;
          }
}
function angkat(e:KeyboardEvent):void{
          if(e.keyCode == 87 || e.keyCode == Keyboard.UP){
                    atas = false;
          }
          if(e.keyCode == 83 || e.keyCode == Keyboard.DOWN){
                    bawah = false;
          }
          if(e.keyCode == 65 || e.keyCode == Keyboard.LEFT){
                    kiri = false;
          }
          if(e.keyCode == 68 || e.keyCode == Keyboard.RIGHT){
                    kanan = false;
          }
}

goToInventory Function :

function inventoryDirect():void{
          normalCursor();
          energy += eConsume;
          tempCamX = testCam.x;
          tempCamY = testCam.y;
          assignCam = true;
          beforeWay = placeStatus;
          placeStatus = "Inventory";
          stopMovement();
          gotoAndStop(3);
}

yeah, it's error 1009 when i trace the button and it's said null when i traced the testCam, with trace(testCam == null), its come out with true.

The code and the object is in the same frame.

Report · Feb 01, 2013

Does the object also exist in frame 1? If it does, does it have the instance name assigned in frame 1?

Report · Feb 01, 2013

Nope the button just appear in frame 2 to frame 27 , inside the testCam, i mean testCam is appear in every frame, the strange thing is when the button created and put inside the testCam MC, its error, i just do another experiment, when i made change the Hoe , and Tool Box into ghrapic, then made the button from both, its working, seems AS3 have an exceptional with double MC in one button ?

Report · Feb 01, 2013

If adding the button in frame 2 of testCam is leading to the error, it is probably because you are trying to target testCam's button while it is not yet present. If you want to target a button inside a movieclip, that button needs to be present when the code executes. If the button is in frame 2 and the code is executing while the movieclip is still at frame 1 then you get an error.

Report · Feb 01, 2013

no, the condition it's like this :

1.I set up the function addMovement to be called if just the testCam exist.

2.The button i put it's not have any code or instance name yet, I just create it to put at the testCam.

Its like imagine that you have non error project first, then you just create a button, and you put inside the testCam, then you want to see how the button looks like if you over in to it, and suddenly the error appear.

The button that i used(The error one) is is from Hoe & Tool box MovieClip, that just have one frame and just a graphic inside, (I made it to movie clip to enable the glow), But if i used a button that i made directly, not from another movie clip, it's working, so it's like, i can't use a button that have Movie Clip inside, must graphic or make it directly.

this is the error :

TypeError: Error #1009: Cannot access a property or method of a null object reference.
     1     at HarvestmoonAlphaTest_fla::MainTimeline/addMovement()[HarvestmoonAlphaTest_fla.MainTimeline::frame1:802]
     2 at HarvestmoonAlphaTest_fla::MainTimeline/mulai()[HarvestmoonAlphaTest_fla.MainTimeline::frame2:9]
     3     at HarvestmoonAlphaTest_fla::MainTimeline/frame2()[HarvestmoonAlphaTest_fla.MainTimeline::frame2:68]
     4     at flash.display::Sprite/constructChildren()
     5     at flash.display::Sprite()
     6     at flash.display::MovieClip()
     7     at HarvestmoonAlphaTest_fla::VCam_AS3_8()
     8     at flash.display::MovieClip/gotoAndStop()
     9     at HarvestmoonAlphaTest_fla::MainTimeline/gerakanMouse()[HarvestmoonAlphaTest_fla.MainTimeline::frame1:681]

before i add that strange button its working as usual, but after i put it (without code or any instance name, just the Buttoon its self), the error point at this :

testCam.bag1.addEventListener(MouseEvent.CLICK, goToInventory);

the button i used is a diffrent button from bag1 button

Report · Feb 01, 2013

One thing you might try is adding a FRAME_CONSTRUCTED event listener in frame 2 and wait to add the click listener to testCam.bag1 until after that is called. In your stack trace exists at flash.display::Sprite/constructChildren() so I am thinking that for whatever reason your frame objects are not yet ready before this ActionScript is being called.

Although what is odd to me is generally the FRAME_CONSTRUCTED event happens before any timeline script even executes - so this may not do anything at all but I am curious why ActionScript is being executed in a constructChildren() stack trace.

addEventListener(Event.FRAME_CONSTRUCTED, frameConstructed);

function frameConstructred(e:Event):void

{

// Call whatever is at frame2:68 or frame2:9 here

}

Report · Feb 01, 2013

Can you explain difference between FRAME_CONSTRUCTED and ENTER_FRAME ? Which better, and it's possible if i change all the ENTER_FRAME into FRAME_CONSTRUCTED ?

Thanks

Report · Feb 01, 2013

and in its error its said

at flash.display::Sprite/constructChildren()

at flash.display::Sprite()

at flash.display::MovieClip()

Report · Feb 01, 2013

if you could, i'll send to your e-mail my project, please help me for this