Solution : https://service.sap.com/sap/support/notes/322550 (SAP Service marketplace login required)
Key words :
erkrs xxxx fcode gen model rkevrk2o program rk2oxxxx prog_type sreplace 'xxxx', project-related incoming sales order, system updates line items, additional key words cj88, program rkevrk2o, record type 'c', record type 'i', function module 'rke_generate_abap', number range interval, document number assignment
Related Notes :
322564 | Different document numbers required for settlement |
300564 | SETTLEMENT: Document number assignment per receiver |
205329 | SETTLEMENT: Variances |