3344448 - Error "Assign source G/L account xxx for Event-Based WIP posting" shown in APP "Postprocess Event-Based Postings - Product Costing"

There's error "Assign source G/L account xxx for Event-Based WIP posting" shown in APP "Postprocess Event-Based Postings - Product Costing".

SAP S/4HANA Cloud

The accounts are not maintained under WIP Sources.
Kindly check configuration SSCUI 103940 - "Event-Based WIP and Variance Posting",
for 'RSEBW' key, check 'Define WIP Sources', choose one source, then click 'Assign G/L Accounts',
you will find that accounts in error message do not exist in any one of WIP sources.

Kindly maintain those accounts into different WIP Sources based on their using scenarios via SSCUI 103940 - "Event-Based WIP and Variance Posting".
Afterwards, you can simulate and post the errors to generate missing event based postings in APP "Postprocess Event-Based Postings - Product Costing".

WIP Sources, 103940, Event-Based WIP and Variance Posting, Postprocess Event-Based Postings - Product Costing, Assign source G/L account, FCO_EBW034. , KBA , CO-PC-OBJ-PER , Product Cost by Period , Problem

SAP S/4HANA Cloud Public Edition all versions ; SAP S/4HANA Cloud all versions