Solution : https://service.sap.com/sap/support/notes/532581 (SAP Service marketplace login required)
Key words : 
0b            import support package 26, 1c            import support package 18, 0b            import support package 4, 0a            import support package 11, transfer structure activation solution, bw support packages, import post-processing, initial transfer structure, transfer structure pl_ds_ap_ea, bw system release
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