Diagnosis
In the interface for generating deliveries, you did not enter thedelivery type or the document type of the preceding delivery.

System Response
The system copies the default value 'NL' into the delivery typefor deliveries with reference to a purchase order, and copies the value'LF' for deliveries with reference to a sales order.

Procedure
Check whether the system has found the correct movement type.

Procedure for System Administration
Check why the preceding document did not determine a delivery type(standard procedure for POs), and why it did not transfer its owndocument type (standard procedure for sales orders).
Even if everything seems to be correct in this case, you can assumethat you may not be able to correctly process more complex businesstransactions using these default values (for example, replenishmentbetween plants in different company codes).