JDev 18.104.22.168.0 BPM
In my form, I have some mandatory fields and a button which will open a popup.
Popup has YesNoCancel buttons at the bottom (not custom buttons)
When the user clicks the 'No' button of the popup, I have to throw validation error on the mandatory fields of the parent form (The form in which the button is present which calls the popup).
Check out 'Strategies for controlling the af:popup close event' in this document http://www.oracle.com/technetwork/developer-tools/adf/learnmore/feb2012-otn-harvest-1538028.pdf