Solution : https://service.sap.com/sap/support/notes/592657 (SAP Service marketplace login required)
Key words : 
br_ora_nls33 = /oracle/client/92x_<bits>/ocommon/nls/admin/datathis, ssxff amnls_timestamp_tz_format = dd-mon-rr hh, loading create database character set reason, $oracle_home/ocommon/nls/admin/data, incorrectly installed oracle server software 6, incorrectly installed oracle client software 5, create database character set, us7ascii database character set, pa-risc -> hp-ux, server nls files installed
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