Solution : https://service.sap.com/sap/support/notes/612536 (SAP Service marketplace login required)
Key words :
cancel billing document &1 due, edit billing documents transaction, request-response mechanism, bdoc type beabilldoccrmb, flow context mo1, bdoc type beabillstacrmb, high system load, respective target system, composite sap note 596323, error message bea219
Related Notes :
| 559829 | FAQ: Tricks and hints for CRM billing |
| 378903 | Queue status in SMQ1, SMQ2 and table ARFCRSTATE |