Action reference in the MAIN view for other Views

Hi Experts,

I have created a view(MAIN) that contains SUBMIT button and also included four other views(Using ViewContainerUIElement) in the MAIN view itslef. So am calling the respective view based on some certain condition from MAIN view.

Now my problem is, am using  check_mandatory_attr_on_view() method which is being called on SUBMIT action from MAIN view of WDDOBEFOREACTION. But it is not checking Required Fields from other views. It checks the Required Fields only in the MAIN view.

I know that I want to call the reference of other views in MAIN view, but how can I do it?

Please help me, as how I can check the Required fields on action of SUBMIT button in MAIN view for other views.

BR,

RAM.