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

[Guest]

error:

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

          at test1_fla::MainTimeline/openPage1()[test1_fla.MainTimeline::frame2:82]

at test1_fla::MainTimeline/onClickBtn1()[test1_fla.MainTimeline::frame2:52]

code:

line 77 -83:

function openPage1():void

{

          var pageNum11:int;

          pageNum11 = pageNum1 - 1;

          trace("tween" + pageNum11 + pageNum1);

          mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1).addTarget(mainMenu.pane1.text1, 1);

}

line 46-59:

function onClickBtn1(e:MouseEvent):void

{

          switch(e.target)

          {

                    case mainMenu.pane1.btnDown:

                              pageNum1 += 1;

                              openPage1();

                              break;

                    case mainMenu.pane1.btnUp:

                              openPage1();

                              pageNum1 -= 1;

                              break;

          }

}

Can anyone tell me where did I do wrong?

[kglad]

if line 82 is the addTarget line, then either

  mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1)

or

mainMenu.pane1.text1

don't exist when that code executes.  use the trace function to determine which.

[Guest]

both of them exist, I used trace

mainMenu.tweenText.getChildByName("tween" +  pageNum11 + pageNum1) is supposed to be a motion tween

[kglad]

which is line 82?

copy and paste both the trace statements in the context of your code and the trace output.

[Guest]

function openPage1():void

{

          var pageNum11:int;

          pageNum11 = pageNum1 - 1;

          trace("tween" + pageNum11 + pageNum1);

          mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1).addTarget(mainMenu.pane1.text1, 1);

}

that's the trace right?

[kglad]

no, that tells you nothing about whether those two objects exist.  use:

function openPage1():void

{

          var pageNum11:int;

          pageNum11 = pageNum1 - 1;

          trace("tween" + pageNum11 + pageNum1);

trace( mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1))

trace(mainMenu.pane1.text1)

          mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1).addTarget(mainMenu.pane1.text1, 1);

}

[Guest]

trace( mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1)) the output is null

trace(mainMenu.pane1.text1) the output is[object Text_24]

[kglad · Accepted solution]

ok, so mainMenu.tweenText.getChildByName("tween" + pageNum11 + pageNum1) doesn't exist for the variable values that were assigned at the time the trace returned null.  fix that.

[Guest]

getChildByName is supposed to be changed to get tween which function is that?

[kglad]

i don't understand your question.  but then i don't understand most of what you're doing.

but if you are trying to reference a timeline tween, it's not an object so it can't be referenced using actionscript until it is converted into an object (ie, movieclip).

[Guest]

thank you anyway guess have to remake the whole thing

[kglad]

you're welcome.