Solution : https://service.sap.com/sap/support/notes/629325 (SAP Service marketplace login required)
Key words : 
message short text716 condensing aggregate &1, shrttxti_parallel_mode type rs_bool  rs_c_false, 0b            import support package 14, 1c            import support package 08, message number r3 299, message class 'rsdd', rfc task xxxx, sill partly condensed, relevant process id, function modules 'rsddk_aggregate_condense'
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