Solution : https://service.sap.com/sap/support/notes/169110 (SAP Service marketplace login required)
Key words : 
budget billing plan reorganizing simulated documents simulated billing, choosing tools -> delete -> simulated billing/print documents</, choosing tools -> archiving -> archive print document lines</, choosing tools -> archiving -> archive budget billing plans</, choosing tools -> archiving -> archive print document headers, choosing tools -> archiving -> archive billing document, directory /general/r3server/abap/note, rear_analyse_bbp</                        analyzes budget billing plans, archive print document line items, sap_isu_prdoch sap_isu_prdocl sap_isu_bill sap_isu_bbp 4
Related Notes : 
       
| 300067 | IS-U Archiv.: Parallel proc. of bill.doc. archiving | 
| 217298 | IS-U archiving: Parallel processing BBP archiving | 
| 217075 | IS-U archiv.: parallel proc. - print doc. archiving | 
| 213073 | Advance import of IS-U/CCS Archive functionality | 
| 209646 | Archiving of billing document lines | 
| 206598 | No doc. line items w. reversal of arch. print doc. | 
| 196167 | Enhancements to print document line item archiving | 
| 194691 | Problems after archiving billing doc. line items | 
| 183442 | Syntax Error, TYPE POOL "AIND" is not known | 
| 181199 | Error when printing simulated invoicing print docs. | 
| 177889 | Cannot display Print-doc, if line-items are archived | 
| 176357 | IS-U archiving: Incorrect comparison date | 
| 168982 | Collective note for IS-U/CCS 1.2 - add-on patch 010 | 
| 99388 | Preliminary transport of Archive Info. System |