Solution : https://service.sap.com/sap/support/notes/979236 (SAP Service marketplace login required)
Key words : 
reconstructing info structures s012, prerequisites program error solution, mm-pur statistics, purchasing document position, transaction oli3bw, vendor evaluation, transaction oli3, incorrect values, quantity delivered, points score 1
Related Notes : 
       
| 1044799 | Negative score for S013-PWMT & S012-MABW | 
| 941300 | Negative values for quantity reliability | 
| 877786 | Valuated blocked stocks - movements 107 and 109 | 
| 865034 | |
| 647025 |