Solution : https://service.sap.com/sap/support/notes/518004 (SAP Service marketplace login required)
Key words : 
mandt = <bw client>            component = sap_bw            name_en = <space>, parameters i_tlogo = 'cube', rfc_destination              saphttpa            blankstocrlf, direct http access, http_get function module, rso_ken_r3link_get function module, sap content documentation, component check, bw documentation, function module
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