Here we would like to draw your attention to OPOC transaction code in SAP. As we know it is being used in the SAP PS-COS (Costs in PS) component which is coming under PS module (Project Systems).OPOC is a transaction code used for View Maintenance V_T399X_N0 in SAP.
It comes under the package KAPS.
Transaction OPOC technical data table
|Purpose||View Maintenance V_T399X_N0|