Solution : https://service.sap.com/sap/support/notes/1137229 (SAP Service marketplace login required)
Key words : 
service development workbench, step 'define session', runtime error 'string_offset_too_large', create_new_chapter solution import, relevant support package, runtime error 'dbif_rsql_invalid_rsql', newly created objects, terms dbif_rsql_invalid_rsql, create objects, existing objects
Related Notes : 
       
| 802371 | TK 364: Request contains corrupted (non-ASCII) table key |