https://userapps.support.sap.com/sap/support/knowledge/en/3700638
3700638 - Error ML4HRUN101 "valuation area locked for period xx year yyyy" in app 'Postprocess...
Error ML4HRUN101 "Valuation Area EPSZ locked for period XX year YYYY (costing run ZZ )" raised in APP 'Postprocess Event-Based Posting Errors - Product...