Just to add 2 cents to Mladen's comment. On server side use "lsnrctl status" or "lsnrctl services" to see the services that are registered with a listener. I assume your environment is set correctly and listener name is by default. Alex PS: Welcome back Malden. Heh, you missed few posts to comment. :) 2006/1/18, Mladen Gogala <gogala@xxxxxxxxxxxxx>: > > On 01/18/2006 10:50:53 AM, Jonathan Knight wrote: > > I have a strange (to me anyway) problem with TNS. > > The problem is not strange. It is a configuration problem. -- //www.freelists.org/webpage/oracle-l