Solution : https://service.sap.com/sap/support/notes/1355746 (SAP Service marketplace login required)
Key words : 
01 sp2/sp3/sp4, trex abap client, method cl_trex_facade->get_index_server_for_search, terms syntax error, solution apply sap_basis 7, syntax error, class cl_trex_facade, attached transport, sap_basis 7, prerequisites
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