Diagnosis
This exception message can occur for one of the following reasons:

• according to the order type, the system is to use external number
assignment; however, the order number was not entered in the transferstructure PKOSA

• according to the order type, the system is to use internal number
assignment; however, an order number was pre-defined in the transferstructure

• the order number entered in the transfer structure is not within a
valid number range

• the order number entered in the transfer structure already exists in
the database

• the order number entered in the transfer structure is already being
processed (error occurred blocking the order)

• the order number entered in the transfer structure cannot be processed
as a system error has arisen