error table in oracle

which table in oracle contains the error messages which we get. I think i saw it here but couldnt fish it out.
thanks
dharma

I don't know how to do this in NT but in Unix, you can use 'oerr'.

If you get the error ORA-12541:TNS: no listener
You can get the full description by typing this at the UNIX command line:

oerr ORA 12541

Then you will see the following:

12541, 00000, "TNS:no listener"
// *Cause: The connection request could not be completed because the listener
// is not running.
// *Action: Ensure that the supplied destination address matches one of
// the addresses used by the listener - compare the TNSNAMES.ORA entry with
// the appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to
// go by way of an Interchange). Start the listener on the remote machine.

So type "oerr", the three letters in the beginning of the error message then the error number.

select * from user_errors;

i think its a x$ table, which contains the error_msg and error code for the errors oracle pops us.this was discussed here some time ago.
the oerr is new to me, thanks.
thx for the help.
-dharma