Compiling error from var isPlaying:Boolean = true;

Question

I need help with correcting a compiling error from the code listed below. The  error reads as follows:
Scene 1, Layer 'actions', Frame 1, Line 10
1152: A conflict exists with inherited definition flash.display:MovieClip.isPlaying in namespace public.
Thanks in advance. Here's my code:
import flash.events.MouseEvent;
import flash.geom.Rectangle;
import flash.events.Event;
//define constraints to keep thumb inside of bar
var constraint:Rectangle = new Rectangle (bar.x, bar.y, bar.width-thumb.width, 0);
var ratio:Number = animatedBug.totalFrames / (bar.width - thumb.width);
var isPlaying:Boolean = true;
//make the movie clip behave like a button
thumb.buttonMode = true;
durr.text = String(animatedBug.totalFrames);
animatedBug.stop();
thumb.addEventListener(MouseEvent.MOUSE_DOWN, handleDown);
stage.addEventListener(MouseEvent.MOUSE_UP, handleUp);
addEventListener(Event.ENTER_FRAME, trackPlayback);
function handleDown(e:MouseEvent):void {
    //pass in the constrain to contain thumb within bar
    e.target.startDrag(false, constraint);
    addEventListener(Event.ENTER_FRAME, trackthumbPos);
    removeEventListener(Event.ENTER_FRAME, trackPlayback);
function handleUp(e:MouseEvent):void {
    thumb.stopDrag();
    removeEventListener(Event.ENTER_FRAME, trackthumbPos);
    addEventListener(Event.ENTER_FRAME, trackPlayback);
    if (animatedBug.isPlaying == true) {
        animatedBug.play();
    } else {
        animatedBug.stop();
function trackthumbPos(e:Event):void {
    var dif:Number = thumb.x - bar.x;
    curr.text = String(animatedBug.currentFrame);
    animatedBug.gotoAndStop(Math.ceil(dif * ratio));
function trackPayback(e:Event):void {
    if(isPlaying == true) {
        thumb.x = bar.x + (animatedBug.currentFrame / ratio);
    curr.text = String(animatedBug.currentFrame);

Answer 1

Hello Andrei1/Ned,
I followed your recommendations by changing the isPlaying variable to jumpStart as well as cleaning up the code a bit. The code now works. Many Thanks!
import flash.events.MouseEvent;
import flash.geom.Rectangle;
import flash.events.Event;
//define constraints to keep thumb inside of bar
var constraint:Rectangle = new Rectangle (bar.x, bar.y, bar.width-thumb.width, 0);
var ratio:Number = animatedBug.totalFrames / (bar.width - thumb.width);
var jumpStart:Boolean = true;
//make the movie clip behave like a button
thumb.buttonMode = true;
durr.text = String(animatedBug.totalFrames);
animatedBug.stop();
thumb.addEventListener(MouseEvent.MOUSE_DOWN, handleDown);
stage.addEventListener(MouseEvent.MOUSE_UP, handleUp);
addEventListener(Event.ENTER_FRAME, trackPlayback);
function handleDown(e:MouseEvent):void {
    //pass in the constrain to contain thumb within bar
    e.target.startDrag(false, constraint);
    addEventListener(Event.ENTER_FRAME, trackthumbPos);
    removeEventListener(Event.ENTER_FRAME, trackPlayback);
function handleUp(e:MouseEvent):void {
    thumb.stopDrag();
    removeEventListener(Event.ENTER_FRAME, trackthumbPos);
    addEventListener(Event.ENTER_FRAME, trackPlayback);
    if (jumpStart) {
        animatedBug.play();
    } else {
        animatedBug.stop();
function trackthumbPos(e:Event):void {
    var dif:Number = thumb.x - bar.x;
    curr.text = String(animatedBug.currentFrame);
    animatedBug.gotoAndStop(Math.ceil(dif * ratio));
function trackPlayback(e:Event):void {
    if(jumpStart) {
        thumb.x = bar.x + (animatedBug.currentFrame / ratio);
    curr.text = String(animatedBug.currentFrame);