Solution : https://service.sap.com/sap/support/notes/892702 (SAP Service marketplace login required)
Key words : 
fund center fails, account assignment detail, prerequisites funds center, selection screen, terms funds_ctr, conversion_exit_alpha_output reason, alpha-converted, symptom description, description, f4_search_fundsctr
Related Notes : 
       
| 1140770 | FAQ: F4-Help Cost Assignment | 
| 1061290 | Zero padded values for cost center - description issues | 
| 982263 | Changes made in account assignment screen 1000 |