How to access a child region (stacked layout) within a parent page's controller. I am extending OIEPageCO where I need to read a task LOV value, and assign a value to the project LOV. These two LOV are part of a stackLayout (child region). I am using the code below. The issue is that it is reading a null value for projnumlov (via OAMessageLovInputBean). I was wondering how to retrieve an attribute value and assign an attribute value for LOV fields within a child region ?