Solution : https://service.sap.com/sap/support/notes/928719 (SAP Service marketplace login required)
Key words : 
additional manual corrections, class /pe1/cl_eh_e_exception_obj_pi, provided corrections, /pe1/dte_bpe_boolean, errors occur, file import, application log, exception handling, solution implement, transaction se24
Related Notes : 
       
| 938738 | Syslog CP6: still using ambiguous blended code page | 
| 938737 | Syslog CP6: still using blended code page |