Solution : https://service.sap.com/sap/support/notes/494441 (SAP Service marketplace login required)
Key words : 
unicode-enabled abap syntax, status record definitions invalidates, symptom warnings stating, stable change format, software partner program, terms control record, customer segment concept, customer enhances structures, existing customer enhancement, edi_dc40data record
Related Notes : 
       
| 493387 | Potential effects of table- and structure - extensions |