Solution : https://service.sap.com/sap/support/notes/928121 (SAP Service marketplace login required)
Key words :
reserve billing documents form, preceding normal billing document, valid billing document exists, reserve billing documents, reserve billing document, - reserve billing document, error message crm_ipm_bea2 021, incorrect results depending, normal billing document, function module cancel
Related Notes :
| 787678 | Regenerating IPM Billing Engine applications |