go to otn.oracle.com

go to documentation, select which database you are on 8 or 9. Select documentation for the database. Select books. There is a book on error codes. Look it up.

Then come back and post the error message and solution. 12154 is your TNSNAMES file.

>
> From: "Nelson, Paula" <Paula.[Email Address Removed] Date: 2003/04/30 Wed AM 08:56:47 EDT
> To: "LazyDBA.com Discussion" <[Email Address Removed] Subject: New DBA needs help! Errors 12154, 12560, and 12514
>
>
> Hi all,
>
> I installed Oracle 8i on a 2000 server, created a database, opened the
> database... all was well. I shutdown the database and powered down the
> server. Now I cannot get it to open again. There has been no activity,
> since I am the only one who knows it exists so far.
>
> I can start the database from DBA studio (no mount), but cannot start it. I
> get errors from SQL*Plus that will not allow me to start it from there.
> Please help!! This project is due tomorrow!!!
>
> Thanks!!
>
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