I've found it amazingly easy to add an item to an ArrayCollection from a PopUp window:
var newItem:Object = {date: myDate.id, height: myHeight, subject: mySubject.text, notes: myNotes.text}; mainApp.myAC.addItem(newItem); However, when it comes to updating that item from a PopUp, it appears to be amazingly difficult (so difficult that I can't figure it out!). mainApp.myAC.updateItem() doesn't seem to be possible from the PopUp, in fact, I can't even do: trace (mainApp.myAC.length); This throw the common "Cannot access a property or method of a null object reference" error. I haven't tried it yet, but all I've found that looks like a possibility, is to create variables in the parent, set those from the PopUp, and then run a function to perform updateItem(), for each value in the ArrayCollection row OR, delete the row, and add a new one. Both create issues with sychronizing front-end display items and backend databases. Please help