Solution : https://service.sap.com/sap/support/notes/1047561 (SAP Service marketplace login required)
Key words :
terms unicode reason, repeated report lines, symptom spool requests, -unicode spool requests, report umg_convert_spool successfully, spool requests, report umg_convert_spool, abap lists, program error, support packagesnote
Related Notes :
1051174 | UMG_CONVERT_SPOOL: Incorrect backup copies |
901004 | Conversion of ABAP spool requests to Unicode. |