I am getting this error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Skool_fla::MainTimeline/frame1()[Skool_fla.MainTimeline::frame1:10]
at flash.display::MovieClip/gotoAndStop()
at Skool_fla::MainTimeline/goback()[Skool_fla.MainTimeline::frame2:22]
What is causing this error and how do I fix it?
This is my code for both the frames:
Frame 1: This is the main menu screen where you can access the credit section
import flash.events.MouseEvent;
//setting up the variables
//events
//stop the timeline
stop();
//the play button
play_btn.addEventListener(MouseEvent.CLICK, playani);
function playani(e:MouseEvent)
{
//asking it to progress to the load menu
gotoAndStop(3);
}
//the credits button
credit_btn.addEventListener(MouseEvent.CLICK, creditslide);
function creditslide(e:MouseEvent)
{
//asking it to go the credits frame
gotoAndStop(2);
}
Frame 2: This is where the credits appear
//
//
//all the imports
//events
var credit:credits_bck = new credits_bck ();
var credits_name: credit_nm = new credit_nm ();
var back_butn: back_button = new back_button ();
addChild (credit);
addChild (credits_name);
addChild (back_butn);
back_butn.addEventListener(MouseEvent.CLICK,goback);
function goback(G:MouseEvent)
{
removeChild (credit);
removeChild (credits_name);
gotoAndStop(1);
}
Either play_btn or back_butn is null. Your error message's line numbers don't correspond to your code so it's hard to say. But the gist is you're trying to access a property of something that isn't anything. Check to make sure you're initializing your variables/references properly.
Maybe your problem is Flash bug too.
In my FLA there was a layer with one empty keyframe. If I puted a vector graphics on it, the error was gone. If there was one or multiple MovieClips and there was no vector graphic - the error was there again.
Then I made a new layer and copy pasted all the objects from damaged layer to new and deleted the damaged layer. It solved the problem.
NOTE: Don't copy the keyframes. Only copy the contents.
Now my project is much more complicated and sadly the error came back again.
Test movie frequently and if the error comes back, check the last keyframes and layers you created.
Related
I'm setting up a button on the first frame which when clicked will transfer the user to the 2nd frame using this code:
stop();
Btn_1.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_2);
function fl_ClickToGoToAndPlayFromFrame_2(event:MouseEvent):void
{
gotoAndPlay(2);
}
and on the second frame, I set up a dynamic text that will perform a countdown using this code:
var myTimer:Timer = new Timer(1000,60); // every second for 60 seconds
myTimer.addEventListener(TimerEvent.TIMER, onTimer);
myTimer.addEventListener(TimerEvent.TIMER_COMPLETE, onComplete);
myTimer.start();
function onTimer(e: TimerEvent):void {
countdown_text.text = String(myTimer.repeatCount - myTimer.currentCount);
}
function onComplete(e: TimerEvent):void{
gotoAndStop(3);
}
the thing is keep getting TypeError: Error #1009 message after debugging it. I know the fault is in line 7 of the 2nd code but I have no idea what is wrong with it. Pls help!
I should see your source fla, but it is most likely related to countdown_text not being accessible in that frame. Error description is "Cannot access a property or method of a null object reference", that means it cannot find the reference which is "countdown_text".
It is very very bad practice to write AS directly in frames. Convert code into a class and assign it as a document class.
You can find Adobe documentation for document class here: https://helpx.adobe.com/animate/using/actionscript-publish-settings.html
I'm doing a little animation using Actionscript 3.0 but I'm having a few problems (I'm new with AS3) when I want to play a movie clip in reverse and, then, return to frame 1(main).
Here is my code:
B6_btn.addEventListener(MouseEvent.CLICK, onClickReverse6);
function onClickReverse6(event:MouseEvent):void{
m6_mc.addEventListener(Event.ENTER_FRAME, playReverse6, false, 0, true);
}
function playReverse6(event:Event):void{
if(m6_mc.currentFrame == 1){
if(playMusic){
playMusic.stop();
}
gotoAndStop(1);
}else{
m6_mc.prevFrame();
}
}
The error I get is with the line
"if(m6_mc.currentFrame == 1)" - ERROR #1009: Cannot access a property
or method of a null object reference
If I remove the command gotoAndStop(1), no error is presented.
Can anyone, please, help me with my code?
As far as I can see, you are calling gotoAndStop some other MovieClip (it's actually whatever this is in your case). But at this time you are checking the currentFrame property fo the m6_mc.
I think there might be some error with that. If you switch this to frame 1, is there a m6_mc instance (if you're not keeping it in a variable)?
I have this code on frame 1, regarding the code presented before:
function onClick6(event:MouseEvent):void{
musicLoader = new URLRequest("music/GABRIEL.mp3");
music = new Sound();
music.load(musicLoader);
playMusic = music.play(0,4);
gotoAndStop(7);
m6_mc.gotoAndPlay(1);}
Disclaimer: I'm really new/incredibly bad at AS3 so it's probably something really stupid that should never happen
Okay so, the first time my main menu frame runs, it runs fine and sends me to the gameplay frame when I press the button. After the gameplay is complete, it returns to the menu frame, and runs fine until I press the same button from before, which calls this error: .
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Main_fla::MainTimeline/frame2()[Main_fla.MainTimeline::frame2:6]
at flash.display::MovieClip/gotoAndPlay()
at Main_fla::MainTimeline/easyPress()[Main_fla.MainTimeline::frame3:83]
at Main_fla::MainTimeline/mClickE()[Main_fla.MainTimeline::frame3:45]
My code for the button is as follows:
buttEasy.addEventListener(MouseEvent.CLICK, mClickE);
buttHard.addEventListener(MouseEvent.CLICK, mClickH);
stage.addEventListener(MouseEvent.MOUSE_MOVE, mMove);
function mClickE(e:MouseEvent){
easyPress();
trace("easyP");
menuUsed = true;
}
function easyPress(){
trace("Waited for press and release");
sTime = 0;
sTempo = (6) ;
sBall = 0;
ballSpeed = 7;
gameIsOver = false;
menuUsed = true;
lvlArray0= new Array(1,0,0,2,0,0,1,0,0,3,0,0,1,0,0,2,0,0,1,0,0,3,0,01,0,0,2,0,0,1);
init2 = false;
buttEasy.removeEventListener(MouseEvent.CLICK, mClickE);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, mMove);
gotoAndPlay(2);
}
I honestly have no idea why this is happening. I'm using mouse events instead of button press events and whatnot because my movieclips started disappearing and flashing and other unexplainable stuff...
yeah...
I just registered, so I can't post this as a comment.
Anyway the error occurs on frame 2, not in the script you've provided (which is on frame 3).
You can see this in the error message:
"at Main_fla::MainTimeline/frame2()[Main_fla.MainTimeline::frame2:6]"
-> frame 2 line 6.
There you're accessing something that doesn't exist anymore. (-> something that is now null)
Maybe an object on the stage that has been removed. (But there are a lot of other possibilities, so don't stick with that solution)
Post the script you have on frame 3 for further help.
The flashing and other unexplainable stuff happens, because of this error. It aborts the script and runs the flash normally. (this means that for example the stop(); method won't be executed -> the player runs through all your frames -> the objects on the stage appear to be flashing)
You're probably just addressing the "stage" before the reference is given. Start your code with:
addEventListener(Event.ADDED_TO_STAGE, init);
and a handler for this listener
private function init(e:Event):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
// write your code after this
}
If you're framescripting (writing AS3 code in a frame) It's not really your problem.
But as the problem states - you're calling some objects property or method witch is null. Your debugger will be able to point to the null object that you try to call on frame 2.
I have been creating a hypermedia player, and i have got to a stage where it is glitching out and it is apparently a...
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at AvalancheCityHypermediaPlayer_fla::MainTimeline/fl_CustomMouseCursor()
Here is my code:
import flash.events.Event;
cust_cursor.mouseEnabled= false;
cust_cursor.addEventListener(Event.ENTER_FRAME, fl_CustomMouseCursor);
function fl_CustomMouseCursor(event:Event)
{
cust_cursor.x = stage.mouseX;
cust_cursor.y = stage.mouseY;
}
Mouse.hide();
I am not sure why it is not working properly, basically when a button is hovered over it is meant to jump to frame 2 and stop, but it is jumping to that frame, and then jumping straight to frame 1 without stopping on frame 2, and stops on frame 1.
1 . Your error isn't producing a line number. You (and I) will find this invaluable for debugging; if in the Flash IDE, you can turn this on in the Publish Settings under swf preferences as a toggle titled "Permit debugging".
2 . Is this code inside a class, or in document code (e.g., Flash IDE "Actions" tab)? If it's inside a class, make sure you pass a reference of the stage to the constructor of your class and assign it to an internally persistent variable so that fl_CustomMouseCursor can address it. By default, classes have no internal way of referencing the stage, and I'm assuming that's what's producing your #1009 error.
For example, inside your class constructor...
package com.example {
public class MyClass {
private var stage;
public function MyClass(arg) {
stage = arg;
}
}
}
And outside when instantiating the class...
var myObj:MyClass = new MyClass(stage);
3 . If you want your code to stop on a frame, use stop(); or gotoAndStop()
4 . Finally, if you're compiling with Flash IDE, you can debug this and see exactly which variable in the stack the runtime environment is having issues with. You can access it from the debug menu or by compiling with control-shift-enter.
I have an SWF loading in an SWF containing a papervision scene.
I've done it before yet problem is, I get an error - I'm not sure what the issue really is.
private function downloadSWF(url:String):void
{
trace(url);
var urlRequest:URLRequest = new URLRequest(url);
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loaderProgressEventHandler);
loader.load(urlRequest);
}
private function loaderProgressEventHandler(ev:ProgressEvent):void
{
loader.preloaderCircle.percent = ev.bytesLoaded / ev.bytesTotal;
}
When the application runs the code - I get the error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at com.dehash.pv3d.examples.physics::WowDemo()
Why am I getting this if the loading hasn't even complete yet?
Thanks in advance guys.
Edit: Try a blank child swf, see if the other one was trying access something in the parent. – Jorge
I did this, it seems, even with a simple SWF with a mouse click listener causes the Error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at simple_fla::MainTimeline/frame1()
My code for that is:
import flash.events.MouseEvent;
this.stage.addEventListener(MouseEvent.CLICK, onClick);
function onClick(ev:MouseEvent):void
{
trace("MouseClick");
}
Am I missing something blatantly obvious??
The problem is that the loaded swf starts running without it being added to the stage. So stage is null, resulting in that error.
The second example with the addedToStageEventHandler works because there stage is only referenced after the object was added to the stage, so stage is not null anymore.
A possible solution for the first error is adding the loader to the stage. That way, when the swf is loaded and starts, it already has a stage reference.
It won't even load if there's an error. You're accessing an unreferenced object on the WowDemo() class...did you instantiate correctly the class?
this seems to work inside my child SWF:
this.addEventListener(Event.ADDED_TO_STAGE, addedToStageEventHandler);
function onClick(ev:MouseEvent):void
{
trace("MouseClick");
var event:Event = new Event("END", true, false);
this.dispatchEvent(event);
}
function addedToStageEventHandler(ev:Event):void
{
this.stage.addEventListener(MouseEvent.CLICK, onClick);
}
does anyone know Why?