Solution : https://service.sap.com/sap/support/notes/552192 (SAP Service marketplace login required)
Key words : 
serial number object list, wv object list, program error caused, terms technical objects, technical objects, error getwa_too_many_segments, error occurs, /3 frontend notes, contract item, processing step
Related Notes : 
       
| 565485 | |
| 555047 | GETWA_TOO_MANY_SEGMENTS in SD (for IS-AFS) | 
| 524562 | GETWA_TOO_MANY_SEGMENTS in SD | 
| 489243 |