3366569 - Error "Different WIP/Reserve account assignment is not allowed in rule" during WIP source configuration

When defining the WIP Account for Source in Configuration Activity / SSCUI "Event-Based WIP and Variance Posting" (103940), the error FCO_EBW018 "Different WIP/Reserve account assignment is not allowed in rule" is triggered.

SAP S/4HANA Cloud

This is triggered when you try to change one of the accounts. As explained in the long text, it is currently not possible to make use of different accounts for various sources.

You must set same B/S accounts and same P&L accounts for all production costs sources.

Set Up Event-Based Processing Key and WIP Account Determination Rules

FCO_EBW018, WIP Source, account assignment, B/S, P/L, Event-based WIP, account determination , KBA , CO-PC-OBJ-2CL , Cost Object Controlling (Public Cloud) , CO-PC-OBJ , Cost Object Controlling , Problem