Copied off my command prompt, no modifications other than obscuring the password: W:\>sqlplus opera_aspx/XXXXXXXX@opapp SQL*Plus: Release 11.2.0.3.0 Production on Mon Nov 10 04:51:40 2014 Copyright (c) 1982, 2011, Oracle. All rights reserved. ERROR: ORA-03135: connection lost contact Process ID: 0 Session ID: 0 Serial number: 0 Enter user-name: ^C W:\>sqlplus usdcdba/XXXXXXXX@opapp SQL*Plus: Release 11.2.0.3.0 Production on Mon Nov 10 04:53:08 2014 Copyright (c) 1982, 2011, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options primary:usdcdba@OPOPERA1> Everything I can find about the 03135 talks about network, firewall, something in between the client and the server. Any thoughts on tracking this down? stephan