Solution : https://service.sap.com/sap/support/notes/571118 (SAP Service marketplace login required)
Key words :
========================================================parameter is_supplytype importingreference type /sapapo/rrp_order_strparameter et_lotstype exportingreference type /sapapo/qtytabsave, ========================================================parameter et_new_iotype changingreference type /sapapo/rrp_order_tabsave, ========================================================================methods rrp_usex_snp2pp_lotstype instance methoddescription creation, ========================================================================methods rrp_usex_snp2ppds_lotstype instance methoddescription creation, data type /sapapo/rrp_lot, terms snp->pp/ds conversion, data element /sapapo/rrp_lot, menu option utilities -> regeneration, daily lot sizesthen put, daily lot sizesthen set