3738684 - Error message "Property 'Material' is invalid" in API API_SUPPLIERINVOICE_PROCESS_SRV for g/l account supplier invoice items

Using the API API_SUPPLIERINVOICE_PROCESS_SRV to create supplier invoice items for G/L account posting fails when the Material field is included; the service returns “Property 'Material' is invalid”, the field appears in the Create Supplier Invoice app.

SAP S/4HANA Cloud Public Edition

API_SUPPLIERINVOICE_PROCESS_SRV, A_SupplierInvoiceItemGLAcctType, supplier invoice, G/L account posting, material field, Property 'Material' is invalid, /IWCOR/CX_DS_EP_PROPERTY_ERROR, OData error, Create Supplier Invoice app, $metadata, payload validation, GL item, invoice API, MM-IV, invoice posting , KBA , MM-IV-LIV-BAPI-2CL , BAPI (Public Cloud) , Problem