Here we would like to draw your attention to OPUK transaction code in SAP. As we know it is being used in the SAP PS-ST (Structures in PS) component which is coming under PS module (Project Systems).OPUK is a transaction code used for Field selection: WBS element in SAP.
It comes under the package CN_PSP_OPR.
Transaction OPUK technical data table
| Tcode | OPUK |
| Purpose | Field selection: WBS element |
| Module | PS |
| Component | PS-ST |
| SAP Package | CN_PSP_OPR |
| Type | P |