any new installations lately on this server (think a new Oracle install such as Oracle client or any Oracle software)? Chris -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Uzzell, Stephan Sent: Thursday, January 03, 2013 8:54 AM To: 'Andrew Kerber' Cc: oracle-l@xxxxxxxxxxxxx; Uzzell, Stephan Subject: RE: local connections fail, but listener connections succeed The SID, yes. The HOME - we've never needed to. Setting the HOME doesn't seem to make any difference though... Stephan Uzzell From: Andrew Kerber [mailto:andrew.kerber@xxxxxxxxx] Sent: Thursday, 03 January, 2013 09:51 To: Uzzell, Stephan Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: local connections fail, but listener connections succeed This is kind of obvious, but did you set ORACLE_SID and ORACLE_HOME? On Thu, Jan 3, 2013 at 8:44 AM, Uzzell, Stephan <SUzzell@xxxxxxxxxx<mailto:SUzzell@xxxxxxxxxx>> wrote: Hey list, This is backwards enough that I don't quite know where to start with it. This morning we noticed that for one environment, we cannot make direct local connections... but we can connect to our hearts' content via the listener. I'm used to seeing the listener act up and being able to connect directly but not via the listener - not this. Oracle 11.2.0.2 on Win 2003 x64 W:\>set ORACLE_SID=MMP52 W:\>sqlplus usdcdba SQL*Plus: Release 11.2.0.2.0 Production on Thu Jan 3 09:39:13 2013 Copyright (c) 1982, 2010, Oracle. All rights reserved. Enter password: ERROR: ORA-12560: TNS:protocol adapter error Enter user-name: usdcdba@mmp52 Enter password: Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options SQL> select instance_name from v$instance; INSTANCE_NAME ---------------- mmp52 Any ideas? Thanks! Stephan Uzzell -- //www.freelists.org/webpage/oracle-l -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.' -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l