Solution : https://service.sap.com/sap/support/notes/1485227 (SAP Service marketplace login required)
Key words : 
terms enterprise role management, support area menu transactions, enterprise role management, role generation reason, area menu transactions, area menus, error message, screen output, issue results, erm frontend
Related Notes : 
       
| 1548963 | Role is not generated in ERM | 
| 1502953 | Function Module not found | 
| 1147651 | RE Role generation : Unable to interpret * as a number |