Hi Suresh, you should Cc: pgsql-admin@postgresql.org in case I don't know or
someone else can help you sooner.

I am using on prod server with psql version : psql 7.4.2
>
> In another test server the version of psql is : Portions Copyright (c)
> 1996-2003, (could not get version)
>
You should figure out what version you're running. You can run psql
--version in a terminal to figure that out. Make sure you're running the
latest revision of whatever major version you choose (8.2.5, for instance).

> I could run this command on test server but couldn't run on prod server.
> May I have some help? Where commercelink is my database name. We use to
> enter into database like this "psql commercelink".
>
pg_dumpall dumps an entire database cluster, not just a database. Either
omit the database name or use pg_dump instead of pg_dumpall.

Peter

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