Flex: access of undefined property

[Danielle R]

Hi all,

I suppose I'm overlooking something very basic, but I can't get something very simple to work.
I try, for example, to access a Graphic from the script block in Flex like this:
immibgroundRect.alpha = 0.5;
The graphic is like this:

    <s:Graphic id="immi" toolTip="{'immigratie: '}{Number(data.immi)*10000}">
        <s:Rect id="immibgroundRect" 
                width="{Number(data.immi)*9}" height="26" 
                x="{Number(data.pop)*9}" y="0">
            <s:fill>
                <s:BitmapFill source="@Embed('../assets/man-in.png')" fillMode="repeat"/>
            </s:fill>            
        </s:Rect>
    </s:Graphic> 

The names match and both highlight grey when I select them yet I get the error:
1120: Access of undefined property immibgroundRect.

What am I missing here? Thanks very much in advance for your help.

[cancerinform]

When are you calling the id? May be the Rect is not yet created.

[Danielle R]

Hi cancerinform, you are right, as ever
I've added a creationComplete event and put the everything in a handler like this:

protected function immi_creationCompleteHandler(event:FlexEvent):void
            {
                TweenLite.to(immibgroundRect, 1, {x:"-100"});
            } 

Now it works, thanks for your advice.