Solution : https://service.sap.com/sap/support/notes/1674072 (SAP Service marketplace login required)
Key words : 
symptom survey update clears, email_search field resulting, terms process control, query methods, save_survey reason, prerequisites reason, solution apply, correction instruction
Related Notes : 
       
| 1748428 | |
| 1657664 | Process Control 10.0 Support Package 08- Master Note |