Solution : https://service.sap.com/sap/support/notes/628748 (SAP Service marketplace login required)
Key words :
it_chkreq type /sapapo/tbl_chkreqit_chkreqitm type /sapapo/tbl_chkreqitmit_chkres type /sapapo/tbl_chkresit_chkres_atp_hd type /sapapo/tbl_chkresis_chkin type /sapapo/chkincreate, it_howtochk type /sapapo/tbl_howtochkthen implement, /sapapo/atpp_update_charfunction group, /sapapo/atppshort text, direct rule-based atp, /sapapo/atpenter, pp/ds subitem, external quantity change, characteristic atpdevelopment class, additional input parameter
Related Notes :
601813 | FAQ: Characteristic evaluation in ATP check mode |