Actionscript 3 Code Keeps Giving Error 1009 - actionscript-3

Question

I managed to apply this code, which fetches a text file and places it into a dynamic text box. Here's the code:
// reference code from permadi
import flash.events.MouseEvent;
import flash.net.FileReference;
import flash.net.FileFilter;
import flash.utils.ByteArray;
import flash.events.MouseEvent;
import flash.events.Event;
import flash.events.IOErrorEvent;
import flash.display.MovieClip;
import fl.controls.ProgressBarMode;
import fl.controls.TextArea;
var mFileReference:FileReference;
stop();
// Setup button to handle browsing
browseButton.buttonMode = true;
browseButton.mouseChildren = false;
browseButton.addEventListener(MouseEvent.CLICK, onBrowseButtonClicked);
// Hide progress bar;
progressBar.visible = false;
// This function is called when the BROWSE button is clicked.
function onBrowseButtonClicked(event:MouseEvent):void
{
trace("onBrowse");
mFileReference=new FileReference();
mFileReference.addEventListener(Event.SELECT, onFileSelected);
var swfTypeFilter:FileFilter = new FileFilter("Text Files","*.txt; *.html;*.htm;*.php");
var allTypeFilter:FileFilter = new FileFilter("All Files (*.*)","*.*");
mFileReference.browse([swfTypeFilter, allTypeFilter]);
}
// This function is called after user selected a file in the file browser dialog.;
function onFileSelected(event:Event):void
{
trace("onFileSelected");
// This callback will be called when the file is uploaded and ready to use
mFileReference.addEventListener(Event.COMPLETE, onFileLoaded);
// This callback will be called if there's error during uploading;
mFileReference.addEventListener(IOErrorEvent.IO_ERROR, onFileLoadError);
// Optional callback to track progress of uploading;
mFileReference.addEventListener(ProgressEvent.PROGRESS, onProgress);
// Tells the FileReference to load the file;
mFileReference.load();
// Show progress bar;
progressBar.visible = true;
progressBar.mode = ProgressBarMode.MANUAL;
progressBar.minimum = 0;
progressBar.maximum = 100;
browseButton.visible = false;
}
// This function is called to notify us of the uploading progress
function onProgress(event:ProgressEvent):void
{
var percentLoaded:Number = event.bytesLoaded / event.bytesTotal * 100;
trace("loaded: "+percentLoaded+"%");
progressBar.setProgress(percentLoaded, 100);
}
// This function is called after the file has been uploaded.;
function onFileLoaded(event:Event):void
{
var fileReference:FileReference = event.target as FileReference;
// These steps below are to pass the data as DisplayObject
// These steps below are specific to this example.
var data:ByteArray = fileReference["data"];
codeText.text = data.toString();
browseButton.visible = true;
progressBar.visible = false;
mFileReference.removeEventListener(Event.COMPLETE, onFileLoaded);
mFileReference.removeEventListener(IOErrorEvent.IO_ERROR, onFileLoadError);
mFileReference.removeEventListener(ProgressEvent.PROGRESS, onProgress);
}
function onFileLoadError(event:Event):void
{
// Hide progress bar
progressBar.visible = false;
browseButton.visible = true;
mFileReference.removeEventListener(Event.COMPLETE, onFileLoaded);
mFileReference.removeEventListener(IOErrorEvent.IO_ERROR, onFileLoadError);
mFileReference.removeEventListener(ProgressEvent.PROGRESS, onProgress);
trace("File load error");
}
It works fine, I added the loaded file to a string, but now I want Flash to read the string and send it to the related frames corresponding to it. Here's the code:
stage.addEventListener(Event.ENTER_FRAME, updateFunction);
function updateFunction(e:Event)
{
if (codeText.text == "Preference 01")
{
gotoAndStop(50);
}
else if (codeText.text == "Preference 02")
{
gotoAndStop(51);
}
else if (codeText.text == "Preference 03")
{
gotoAndStop(52);
}
else if (codeText.text == "Preference 04")
{
gotoAndStop(53);
}
else
{
gotoAndStop(54);
}
}
I Keep Getting Error 1009 About A Null Object, I Tried For Hours But I Think I Need Some Help.

Answer 1

If all you want is to go to a different frame based on what you loaded, simply remove your updateFunction and replace your onFileLoaded() function with the following:
function onFileLoaded(event:Event):void {
var fileReference:FileReference = event.target as FileReference;
// These steps below are to pass the data as DisplayObject
// These steps below are specific to this example.
var data:ByteArray = fileReference["data"];
browseButton.visible = true;
progressBar.visible = false;
mFileReference.removeEventListener(Event.COMPLETE, onFileLoaded);
mFileReference.removeEventListener(IOErrorEvent.IO_ERROR, onFileLoadError);
mFileReference.removeEventListener(ProgressEvent.PROGRESS, onProgress);
codeText.text = data.toString();
switch (codeText.text) {
case "Preference 01":
gotoAndStop(50);
break;
case "Preference 02":
gotoAndStop(51);
break;
case "Preference 03":
gotoAndStop(52);
break;
case "Preference 04":
gotoAndStop(53);
break;
default:
gotoAndStop(54);
}
}
Please be sure to enable Debug mode and compile in that mode so you can get specifics like line numbers on your errors. Also, to avoid BotMaster's complaints in the future, be sure to read https://stackoverflow.com/help/mcve