This again --TypeError: Error #1010: A term is undefined and has no properties

Hi all I know there are several threads on this.  I have a file with three frames: frame 1 is a main menu with buttons linking to frame 2 (an english menu) or frame 3 (a french one.)

Within each sub menu is a code which loads various external swfs.  When ever the play head enters these sub menus in frames 2 or 3 i get the following output error.

TypeError: Error #1010: A term is undefined and has no properties.

  at LungCancer_index_fla::English_mc_14/frame1()

or

TypeError: Error #1010: A term is undefined and has no properties.

  at LungCancer_index_fla::French_mc_21/frame1()

if its going to the French menu.

I don't understand what the _14 or the _21 is, beside the French_ or English_mc's

Otherwise the file works great and I'm tempted to just ignore the error but I'd still like to know.

Thanks in advance 

Here is the code for the english menu if it helps.

.......................................................

stop();

//  main menu button

  FrenchBtn.addEventListener(MouseEvent.CLICK, gotoFr);

  homeBtn.addEventListener(MouseEvent.CLICK, gotoMainMenu);

  function gotoFr(event:MouseEvent):void

{

  MovieClip(this.root).gotoAndStop("French");

}

  function gotoMainMenu(event:MouseEvent):void

{

  MovieClip(this.root).gotoAndStop("top");

}

//////CHAPTER MENU : Event Listeners ////////

brainCancer.addEventListener(MouseEvent.CLICK, ch1);

medication.addEventListener(MouseEvent.CLICK, ch2);

surgery.addEventListener(MouseEvent.CLICK, ch3);

radiotherapy.addEventListener(MouseEvent.CLICK, ch4);

chemotherapy.addEventListener(MouseEvent.CLICK, ch5);

support.addEventListener(MouseEvent.CLICK, ch6);

//----------------------------------------------

function ch1(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = -115;

}

function ch2(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = 135;

}

function ch3(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = 385;

}

function ch4(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = 635;

}

function ch5(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = 885;

}

function ch6(e:MouseEvent):void{

subMenu.x = -25;

subMenu.y = 1135;

}

//-------------calling external SWFs -----------------//

var Xpos:Number = -250;

var Ypos:Number = -350;

var swf:MovieClip;

var loader:Loader = new Loader();

var defaultSWF:URLRequest = new URLRequest("swfs/cover.swf");

loader.load(defaultSWF);

loader.x = Xpos;

loader.y = Ypos;

addChild(loader);

// Btns Universal function

function btnClick(event:MouseEvent):void {

removeChild(loader);

var newSWFRequest:URLRequest = new URLRequest("swfs/" + event.target.name + ".swf");

loader.load(newSWFRequest);

loader.x = Xpos;

loader.y = Ypos;

addChild(loader);

}

// ------------- BTN LISTENERS ---------------------------//

//chapter1 : What is Glioma

subMenu.chapter1_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter1_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter1_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter1_4.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter1_5.addEventListener(MouseEvent.CLICK, btnClick);

//chapter2 : Medications

subMenu.chapter2_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter2_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter2_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter2_4.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter2_5.addEventListener(MouseEvent.CLICK, btnClick);

//chapter3 : Surgery

subMenu.chapter3_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_2_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_2_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_2_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_4_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_4_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_4_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_5.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_6_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_6_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter3_6_3.addEventListener(MouseEvent.CLICK, btnClick);

//chapter 4 : Radiotherapy

subMenu.chapter4_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter4_2_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter4_2_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter4_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter4_4.addEventListener(MouseEvent.CLICK, btnClick);

//chapter 5 : Chemotherapy

subMenu.chapter5_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_2_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_2_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_4_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_4_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_5.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_6.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter5_7.addEventListener(MouseEvent.CLICK, btnClick);

//chapter 6 : Support

subMenu.chapter6_1_1.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter6_1_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter6_1_3.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter6_2.addEventListener(MouseEvent.CLICK, btnClick);

subMenu.chapter6_4.addEventListener(MouseEvent.CLICK, btnClick);