Solution : https://service.sap.com/sap/support/notes/1561516 (SAP Service marketplace login required)
Key words : 
software component                        release     package name______________________________________________________________________sap basis component                                          620          sapkb62070                                          640          sapkb64028                                          700          sapkb70025                                          701          sapkb70109                                          702          sapkb70208                                          710          sapkb71013                                          711          sapkb71107                                          720          sapkb72005                                          730          sapkb73003, error 'otf end command // missing, relevant support package, system character sets, incomplete pdf file, pdf solution implement, spool request terminates, pdf conversion, spool request, support packages
Related Notes : 
       
| 1561139 | Displaying spool requests with mixed endian | 
| 1310720 | Collection Note for Unicode Systems with different endianess | 
| 85318 | Appending documents to existing spool requests |