Arun: Remove the ADDRESS_LIST and just use multiple ADDRESSes in the tnsnames.ora file. ADDRESS_LIST is generally used for CTF. You didn't tell me the version and patchset of the database. I assume it is 9.2.0.4. The simple option is to find out from where 3113 is prompted. Enable the client network tracing at level 16 (or support) and have a look at those trace files. ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------