How can I use the field "Sales Order" on derivation?

Question

Dear All.
This is about PA characteristic derivation.
I want to change the characteristic value "Sales Order (KAUFN)" by derivation.
But I cannot select the characteristic field on target field.
The field "Sales order(KAUFN)" doesn't exist there.
Why? How can I use the field "Sales Order" on derivation?
Y.C.Bae

Answer 1

Hi Bae,
in order to be able to choose fields KAUFN (for sales order) and KDPOS
(for sales order item) as target fields of derivation step 'enhancement'
you have to modify the coding of subroutine EXIT  GET_ALLOWED_TARGETS
in program RKEDRCOPA like this:
    NAME-IDENTIFIER = 'CO-PA'.
    NAME-TABNAME = FIELDTAB_ENTRY-TABNAME.
    NAME-FIELDNAME = FIELDTAB_ENTRY-FIELDNAME.
    IF FIELDTAB_ENTRY-USGFL CA 'DUV'
BEGIN OF INSERTION *****
         OR FIELDTAB_ENTRY-FIELDNAME = 'KAUFN'
         OR FIELDTAB_ENTRY-FIELDNAME = 'KDPOS'
END   OF INSERTION *****
         OR FIELDTAB_ENTRY-FIELDNAME = 'KNDNR'
         OR FIELDTAB_ENTRY-FIELDNAME = 'ARTNR'
Actually sales order number and sales order item shouldn't be changed
by derivation (therefore they are no valid target fields in standard)
but if you need to fill them within an enhancement this modification
will help you to define them as valid target fields. But this is just
the technical frame so far; the logic from which table you'd like to
derive the sales order number correctly depends on your implementation
of the enhancement! I just want to ask you to be rather careful with
the implementation of the exit so that the sales order number isn't
changed in cases that shouldn't be concerned.
Regards,
Abhisek