Solution : https://service.sap.com/sap/support/notes/841128 (SAP Service marketplace login required)
Key words :
terms crm_av_check_apo_01 change_apo_result_native_form ct_aporeqitm if_ex_crm_av_check_apo_01 reason, request schedule lines, call transaction se18, 'interface' tab title, crm_av_check_apo_01 badi, change_apo_result_native_form method, ct_aporeqitm structure, crm_av_check_apo_01 definition, ct_aporeqitm type, program error
Related Notes :
| 881176 | FAQ: ATP: Availability information in R/3 |
| 841129 | Yellow traffic light although requ deliv date was confirmed |