I am facing an issue in SAP EWM where serial number validation fails during Goods Receipt (GR) or Goods Issue (GI).

The delivery is processed successfully, but when confirming the warehouse task or posting the goods movement, the system either requests serial numbers that cannot be entered or displays an error indicating that the serial numbers are invalid or incomplete.

I would like to understand the possible causes and the correct troubleshooting approach.

Please help with the following points:

• How are serial numbers managed in SAP EWM?
• What is the role of the serial number profile in SAP S/4HANA and SAP EWM?
• How can we configure serial number processing for inbound and outbound deliveries?
• Why does SAP EWM reject valid serial numbers during warehouse task confirmation?
• How can we verify whether serial numbers are synchronized correctly between SAP S/4HANA and SAP EWM?
• Can warehouse process type, delivery item type, or product master settings affect serial number validation?
• Which transactions and /SCWM/MON nodes should be checked when serial number errors occur?
• How can we troubleshoot missing, duplicate, or incorrect serial numbers?
• What are the most common configuration mistakes that lead to serial number validation failures?
• Can someone share a real-time project example with the complete troubleshooting process?

A step-by-step explanation with configuration paths, transaction codes, debugging tips, and a practical example would be very helpful.