We recently went live on a new third party system with an Oracle RAC backend. We have 5 nodes on Oracle 10.2.0.3 on Windows 2009 64bit. We have sporadic performance issues that we are trying to resolve and I am finding trace files frequently on node#1. The error message in the trace file is: opitsk: network error occurred while two-task server trying to send break; error code = 12571 I am familiar with Ora-12571 TNS Packet writer failure but not with this error message. Can anyone shed some light on what it means how to troubleshoot it and what impact it has on user session or performance? I found very little on Metalink about this specific error message. TIA, Nancy Iles Omni Hotels _________________________________________________________________ Windows Live™: E-mail. Chat. Share. Get more ways to connect. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t2_allup_howitworks_022009-- //www.freelists.org/webpage/oracle-l