Solution : https://service.sap.com/sap/support/notes/778253 (SAP Service marketplace login required)
Key words :
attribute 'upper/lower case entry', display function group bbp_soco_ui_its, field gs_group_area_item-vendor_no deselect, start transaction se80, tabstrip 'element list', properties tabstrip remove, activate screen 200 set, save screen 200 refer, -mentioned related note 632982, template screen save
Related Notes :
| 632982 | Generation of the screens for the sourcing |