3132872 - SMQ2 Error 'IO304 - Only &1 serial numbers entered instead of &2' (General)

Symptom

*_DELIVERY_CONFIRM_DEC queue stuck on ERP SMQ2 with error: 'Only &1 serial numbers entered instead of &2 (Message No. IO304)'.
Delivery item, at 'VL03N/VL33N > Extras > Serial number', displays error: 'Serial number profile is missing for material &1 in plant &2 (Message No. VL421)'.

Environment

SAP S/4HANA
SAP ERP Central Component (ECC)
SAP Service Parts Management (LO-SPM)
Logistics Execution (LE)
SAP Extended Warehouse Management (SCM-EWM)

Product

SAP ERP Central Component all versions ; SAP ERP all versions ; SAP Extended Warehouse Management all versions ; SAP S/4HANA all versions

Keywords

Only 0 serial numbers entered instead of &1, VL 421 , IO 304, VL421, IO304, subcontracting, inbound delivery, PO, finish product, serial number, IO304, QUEUE STUCK WITH ERROR, IO 304, SERIAL NUMBERS, SERIAL NUMBER PROFILE, LIPS-SERAIL, LIPS-ANZSN, GR Reversal, BAPI_OUTB_DELIVERY_CONFIRM_DEC, /SPE/INB_DELIVERY_CONFIRM_DEC

, KBA , LO-SPM-OUT , Outbound Process , LO-SPM-INB , Inbound Process , SCM-EWM-IF-ERP-DLP , Interface ERP Delivery Processing , LO-SPM-X , Cross-Application Topics , LE-IEW-OUT , Outbound Process , Problem

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