Solution : https://service.sap.com/sap/support/notes/667439 (SAP Service marketplace login required)
Key words : 
/minus sign reversal reason, 1 content            import support package 11, 0b            import support package 17, /minus sign reversal, rssh_get_signchange function module, 0b support package 17, brain 299 error message, bw support packages, 1c support package 11, support package
Related Notes : 
       
| 571747 | SAPBWNews BW 3.1 Content Support Package 11 | 
| 571742 | SAPBWNews BW 3.0B Support Package 17 |