3344448 - Error "Assign source G/L account xxx for Event-Based WIP posting" - SAP S/4HANA Cloud Public Edition

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

SAP S/4HANA Cloud Public Edition

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

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

2737228 - SAP S/4HANA Cloud: Event-Based Work in Process (WIP) Posting for Product Cost by Order

WIP Sources, 103940, Event-Based WIP and Variance Posting, Postprocess Event-Based Postings - Product Costing, Assign source G/L account, FCO_EBW034, EBWP, EBVP, FCO_EBW 034. , KBA , CO-PC-OBJ-PER , Product Cost by Period , Problem