Solution : https://service.sap.com/sap/support/notes/98507 (SAP Service marketplace login required)
Key words : 
service -> international -> support services -> installation/upgrade -> installation guides -> standard -> release 4, cd $oracle_home           rm -rf orainstnew =====> rm -rf orainst_sap           cp -, oracle upgradei/ important general comments-------------------<d019144 10/feb/99>-------------------------current version, /general/r3server/patches/common/nt/i386/        unpack, ora-dateien09/nov/98 ii/    unix/hp-ux, oracle migration---------changed--------<d019301 03/jul/98>--------------------------------------------------<d019301 16/jun/98>--------------------------, sql------ changed ---------<do20222 16/jun/98>--------------------------------------------------<do23648 04/jun/98>--------------------------, <z1>/oracle/stage 400 mb </>-------------------------<d019132 26/nov/98>-------------------------, /  important general comments    ii/ correction, september 1998----------changed--------<d019144 21/sep/98>--------------------------------------------------<d019144 03/jul/98>-------------------------
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