Here we would like to draw your attention to O4NSN transaction code in SAP. As we know it is being used in the SAP IS-OIL-DS (Downstream in IS-OIL) component which is coming under IS-OIL module (Oil & Gas). O4NSN is a transaction code used for Display Nomination in SAP.
It comes under the package for TSW Traders and Schedulers Workbench (OIJ). When we execute this transaction code, ROIJ_NOM_GUI is the normal standard SAP program that is being executed in background. Transaction code O4NSN is included in the SAP component for IS-OIL.
Transaction O4NSN technical data table