Solution : https://service.sap.com/sap/support/notes/1172913 (SAP Service marketplace login required)
Key words :
required entry field check reason, terms required entry field, symptom required entries, active tab page, source code corrections, wrong sequence, additional data, basic data, program error, mt_mand_fields
Related Notes :
| 1335432 | Field control: Composite note about corrections/information |