Solution : https://service.sap.com/sap/support/notes/838333 (SAP Service marketplace login required)
Key words :
import parameter it_aggr type frm31_aggr_tab_type enter 'aggregated table', visibility = 'protected' type frm31_aggr_tab_type save, et_aggr type frm31_aggr_tab_type method, description 'return aggregation table, entry mt_aggr level='instance', method get_aggr_tab level='instance', display additional columns, terms recipe management, 'attributes' tab page, 'methods' tab page
Related Notes :
| 841771 | RMGMT221: Corrections in Support Package 03 |