Nandu, Are you back in US? ________________________________ From: racdba-bounce@xxxxxxxxxxxxx [mailto:racdba-bounce@xxxxxxxxxxxxx] On Behalf Of Konat Nandu Sent: Thursday, January 05, 2006 9:13 AM To: racdba@xxxxxxxxxxxxx Subject: RAC Re: CONC-SM TNS FAIL message in CCM log file Hameer, I would check the Fnd_Nodes table for invalid node entries and network log files for further information. Regards, Nandu On 1/4/06, Hameed, Amir <Amir.Hameed@xxxxxxxxx> wrote: Hi, I am running a single-instance 11.5.9/9.2.0.6 environment. The following message is appearing in the CCM log file: CONC-SM TNS FAIL The managers are running fine and there is no other error in the log file. What is the best way to diagnose the root cause of this message? Thanks Amir