OPA1 SAP tcode for – Maintain combination definitions

Here we would like to draw your attention to OPA1 transaction code in SAP. As we know it is being used in the SAP PP-CRP (Capacity Requirements Planning – PP) component which is coming under PP module (Production Planning).OPA1 is a transaction code used for Maintain combination definitions in SAP.

SAP OPA1 transaction code

It comes under the package CY0C.

SAP OPA1 menu path

See the possible menu paths to access the same report by avoiding entering the transaction code.
Path 1
Logistics → Project System → Information System → Tools → Resources → Select → Combination Definition


Path 2
Accounting → Project System → Information System → Tools → Resources → Select → Combination Definition


Path 3
Information Systems → Project System → Tools → Resources → Select → Combination Definition


Path 4
Information Systems → General Report Selection → Project System → Tools → Resources → Select → Combination Definition


Transaction OPA1 technical data table

TcodeOPA1
PurposeMaintain combination definitions
ModulePP
ComponentPP-CRP
SAP PackageCY0C
TypeP