Solution : https://service.sap.com/sap/support/notes/650887 (SAP Service marketplace login required)
Key words :
private member variable p_abs_url, older support package versions, attached source code corrections, latest support package, key langu = <initial>, prerequisites relative urls, sap->bw->mime, ms excel protection, class cl_rsr_xls_gridafter implementing, absolute urls
Related Notes :
| 571744 | SAPBWNews BW 3.1 Content Support Package 10 |
| 571699 | SAPBWNews BW 3.0B Support Package 16 |