Here we would like to draw your attention to OPUI 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).OPUI is a transaction code used for Field selection: Std. WBS elements in SAP.
It comes under the package CN_PSP_STD.
Transaction OPUI technical data table
| Tcode | OPUI |
| Purpose | Field selection: Std. WBS elements |
| Module | PS |
| Component | PS-ST |
| SAP Package | CN_PSP_STD |
| Type | P |