Solution : https://service.sap.com/sap/support/notes/749041 (SAP Service marketplace login required)
Key words : 
hp tru64 unix platform fails, initialize parameter subsystembr310e connect, database instance <dbsid> failed, location thr_db_connect-4ora-12158, terms br tools, br301e sql error -12158, symptom starting brconnect, error message, downloading patches, brconnect reason
Related Notes : 
       
| 680046 | Corrections in BR*Tools Version 6.40 | 
| 514205 | Corrections in BR*Tools version 6.20 | 
| 403706 | Corrections in BR*Tools Version 6.10 |