Solution : https://service.sap.com/sap/support/notes/538689 (SAP Service marketplace login required)
Key words :
typing mix type optional pass, system generates error message >2472, valuex_param type isu21_invoice_param, budget billing amount, annual consumption billing, partial bill creation, payment form reference, 'payment form &1, periodic bill, terms ea11
Related Notes :
544198 | INV: Error >2722 with partial bill creation |
503401 | INV: Payment form reference in partial bill |