Having problem sales order delivery with ship complete yes
I'm having a problem in the sales order delivery, and need help please. I created a sales order with the ship complete flag set to "Yes". The sales order has three positions. Position #s 10, and 30 are cost items for freight exxpenses, and pos. # 20 is for manufactured sales item. The physical item in pos. # 20 is lot controlled item by lot. So, I maintained outbound and released for posi. # 20, When I enter in the maintain delivery session to change confirm flag to yes for posi. # 20, and to complete delivery for the remaining positions, the system doesn't allow, and gives message "Order must be delievred completely".How to deliver all the items, and any adise on this issue please.
Thanks in advance for the help.