Hi Jenny,
if you use the output type (menu extras --> Delivery Output --> header) you could use the log of this part. The informations are stored in the CMFP table.
to update this log use the function module :
CALL FUNCTION 'NAST_PROTOCOL_UPDATE'
EXPORTING
MSG_ARBGB = SYST-MSGID
MSG_NR = SYST-MSGNO
MSG_TY = SYST-MSGTY
MSG_V1 = SYST-MSGV1
MSG_V2 = SYST-MSGV2
MSG_V3 = SYST-MSGV3
MSG_V4 = SYST-MSGV4
EXCEPTIONS
OTHERS = 1.
Regards
Fred