Solution : https://service.sap.com/sap/support/notes/1562839 (SAP Service marketplace login required)
Key words : 
prerequisites missing functionality solution apply, symptom question library, terms question library, xml upload, upload reason, correction, note 1563486
Related Notes : 
       
| 1563486 | Question library mass upload | 
| 1549787 | Process Control 10.0 Support Package 03 - Master Note |