1024 Error in AS3

Question

1024: Overriding a function that is not marked for override.

OK, basically trying to move through a frame by frame
animation with the first two previous and next buttons, but also
allow people to jump to certain frames with other buttons.

here is the code producing the 1024 error

btnNext.addEventListener (MouseEvent.CLICK, moveNext);
function moveNext(evt:MouseEvent):void {
nextFrame();
};

btnPrev.addEventListener (MouseEvent.CLICK, movePrev);
function movePrev(evt:MouseEvent):void {
prevFrame();
};

btnPreschool.addEventListener (MouseEvent.CLICK,
gotoAndStop);
function gotoAndStop(evt:MouseEvent) {
gotoAndStop("preschool");
};

stop()

I have tried everything I can think of. I am a complete n00b
at this and am completely lost.

Newsgroup_User · Accepted Answer

sholditch,

Your problem happens in these two lines:

> btnPreschool.addEventListener (MouseEvent.CLICK, gotoAndStop);
> function gotoAndStop(evt:MouseEvent) {

The reason this is a problem is because ActionScript already contains a
function (actually, a MovieClip method) called gotoAndStop(). In the lines
you just showed, you're asking Flash to forget what it already knows as
"gotoAndStop" and, instead, run a custom function of the same name.

This sort of thing is allowed if the function in question is slated for
replacement in the original class file (here, the MovieClip class). By
replacement, I mean that the function is question can optionally be allowed
to be replaced, or overridden, at runtime.

Because the gotoAndStop() method is *not* marked for override, you get
the 1024 message when you attempt to override it:

> 1024: Overriding a function that is not marked for override.

So, the quickest way around this error is to come up with a different
name for your btnPreschool event handler. How about "jumpToFrame"?

btnPreschool.addEventListener (MouseEvent.CLICK, jumpToFrame);
function jumpToFrame(evt:MouseEvent):void {
gotoAndStop("preschool");
};

David Stiller
Co-author, ActionScript 3.0 Quick Reference Guide
http://tinyurl.com/2s28a5
"Luck is the residue of good design."

Newsgroup_User · Answer

sholditch,> David, once again, you are my hero. Sweet! Glad I could help.> Your book just arrived at home and I am very much> looking forward to delving into the AS3.0 chapter. I> feel like if I can just get my head wrapped around the> basics this stuff will come a lot easier to me. It was definitely that way for me with AS2, and then againwith AS3. In fact, I suspect it's true for a lot of people. When it comesto new territory, many find it hard to know where to begin. Naturally, I hope you get value out of the book, but even at650+ pages, there's no way Tom and I could anticipate everyone'squestions, so don't hesitate to get in touch with either of us if you spotsomething that doesn't make sense (contact info is in "About the Authors").The book's website has a Corrections page that lists typos reported byreaders, so make sure to check that out: http://www.FoundationFlashCS3.com/ http://www.FoundationFlashCS4.com/ Plus, I've been on these forums for years, so I'm usuallynot too hard to find.David StillerCo-author, ActionScript 3.0 Quick Reference Guidehttp://tinyurl.com/2s28a5"Luck is the residue of good design."

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