Solution : https://service.sap.com/sap/support/notes/1070261 (SAP Service marketplace login required)
Key words : 
required action      iconblank                wheelc                    completion banner1                    red alert2                    yellow exclamation mark3                    yellow exclamation mark4                    red alert5                    red alert 3, yellow exclamation mark, - status icon- required-action indicator- nf-, exception        short textprocess_errors   errors occured, required-action indicator based, authorization profile required, function modules j_1b_nfe_set_action_indicatorde-select, code             textaccept_rej       accept canc, user action requiredc, requiredthe status icon
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