Diagnosis
The system does not have any settings for copying from &V2& &V3& &V4&to &V1&.

System Response
The system does not copy the item from the reference document.

Procedure
If you want to be able to copy an item using the current sales documenttype and item types, supplement the &V1& &V2& &V3& &V4& entry incopying control in Customizing with:
INCLUDE 'NA_CUST_MAINTAIN_3' OBJECT DOKU ID TX LANGUAGE EN