I was able to create return delivery with out ref using vlo1no.
When i use bapi -BAPI_OUTB_DELIVERY_CREATENOREF, am geeting an error .
A ICC_NUMBERING 770 Global official numbering: Input parameter incomplete
E BAPI 001 No instance of object type OutboundDelivery has been created. External reference:
dates, del_items,serial_nos are filled,
data-usage as 0, shipping point, sales org,div, dis chanel, del type,ship to are passed.
Which parameter am i missing here?