Need help on a PopUpManager error

Question

I have a class which has a Mouse_Over event that executes the following function,
private function CreatePopUp(event){
     popUpObject = PopUpManager.createPopUp(this, PopUpClass);
     // Do Stuff //
     this.addEventListener(Mouse_Down, DestroyPopUp);
     this.addEventListener(Mouse_Out, DestroyPopUp);
     function DestroyPopUp(event){
          removeEventListener(Mouse_Down, DestroyPopUp);
          removeEventListener(Mouse_Out, DestroyPopUp);
          PopUpManager.removePopUp(popUpObject);
I have a whole bunch of these objects in my application.  For the most part, the pop ups work very smoothly.  However, if you keep waving the mouse over the objects, a random error will eventually occur.  After debugging, I found that an error is being thrown in SystemManager.updateLastActiveForm() on line 5087 because the index is = -1.  Does anyone know what might be causing this and how I can fix it?

Answer 1

That's a bug in Flex.  It is caused by the popup being destroyed before it has dispatched creationComplete event.  If you get mouseOut right away you'll hit that, the way your code is written.
The fix will be in 3.4, I don't think it is in 3.3.  You could add your listeners after creationComplete.  That might be a workaround.
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui