Solution : https://service.sap.com/sap/support/notes/893427 (SAP Service marketplace login required)
Key words :
sapbwnews bw sp15 netweaver'04 stack 15, comma separated values, large data quantity, precalculating html pages, call transaction se16, repeatedly choosing f3, separate csv file, select outform = csv, 50 import support package 15, output format field
Related Notes :
| 948468 | Output format "separate CSV file for each data provider" |
| 836440 | SAPBWNews BW Support Package 15 NW'04 Stack 15 RIN |