Hi Guru's I'm facing this problem in oracle 8i Dev database running on solaris, this we are facing after installing netbackup binaries. i have to do clone by shutting down the database to validate the netbackup. Please suggest should i kill the instance and relink of libraries would solve my problem. I checked in metalink but did not get any help. Please help me on this Thanks in advance. Avadhani bash-2.05$ sqlplus "/as sysdba" SQL*Plus: Release 8.1.7.0.0 - Production on Wed Dec 24 01:30:32 2008 (c) Copyright 2000 Oracle Corporation. All rights reserved. ld.so.1: oracle<SID>: fatal: relocation error: file /opt/app/oracle8i/products/817/lib/libobk.so: symbol disableAutoMsgCacheUnload: referenced symbol not found ERROR: ORA-12547: TNS:lost contact