Solution : https://service.sap.com/sap/support/notes/804121 (SAP Service marketplace login required)
Key words :
executable program called zisu_xpra_logno, active budget billing plans, inactive budget billing plans, budget billing plans, worst case scenarios, correction instructions attached, -live tests begin, part takes longer, r3up stop xpras_upg, terms performance problems
Related Notes :
| 902705 | BBP:Too many budget billing plan itms in budget billing plan |
| 874418 | Additional info about upgrading to SAP ECC 6.0 with IS-U/CCS |