Solution : https://service.sap.com/sap/support/notes/1684455 (SAP Service marketplace login required)
Key words : 
symptom add regulation requirement loading functionality, maintain control regulation requirement assignment data, prerequisites advanced development solution apply, goto-text elements-selection texts, regulation requirement loading functionality, worksheet 'control requirements', terms mdug reason, related support package, attached correction instruction, open report grfn_mdug
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