Solution : https://service.sap.com/sap/support/notes/92686 (SAP Service marketplace login required)
Key words :
additional key words drill-, detail list, 'export' 'save, column headings, blank line, program error, advance correction, prerequisites, releases 3, attachment
Related Notes :
| 81576 | Drill-down rep.: save in file w. two-line col.title |
| 78761 | Drill-down reporting: saving in a file |
| 71659 | Drilldown rep.: advance transport 'Save in file' |