Solution : https://service.sap.com/sap/support/notes/1473087 (SAP Service marketplace login required)
Key words :
> installation > 3 - installation - standalone engines > sap netweaver search, upgrade guides > sap netweaver > sap netweaver 7, - load attribue $trexextermalkey$ directly, support package reason, fix program errors, master/slave scenario, create concat attribute, existing trex instance, classification trex > installing, file trex71_39-<key>
Related Notes :
| 1021162 | Update TREX 7.10: Central Note |
| 1003900 | TREX 7.1: Central note |