Reg- Single invoice for multiple delivery docs

Dear All,

WIth the suggestions from the below given thread, i have changed the routines in copying control for item level as 03.

SAP ERP Sales and Distribution (SAP SD)

Using delivery duelist(VF04) , I selected 2 pending docs and tried to create billing doc , but it got created as separate invoice. what is the actual process to create single invoice from multiple delivery document.

Rgds