Tom:
I believe the problem is the same on Win as Unix.
Here are some notes  I made on this error.
hope they help.

Barb


> When you start the database, a key for the shared memory segment is
> calculated based on the contents of ORACLE_SID and ORACLE_HOME.  When you
> try to connect to the database, your process needs to find the shared
> memory
> segment.  It does so by matching your oracle_sid and oracle_home against
> this hashed key. (In the case of a network connection, it does this by
> using
> the oracle_sid and oracle_home in the listener.)
> 
> 
> Check to see how your environment was set when you started the database
> versus how it is set when you're trying to connect.  In particular, if the
> oracle_home path or the oracle_sid is different in any way,you'll get the
> messages
> 
>       ORA-01034: ORACLE not available
>       ORA-27101: shared memory realm does not exist
>       SVR4 Error: 2: No such file or directory
> 
> In my case, I had the sid as lower case for the session that started the
> database, and upper case in the listener.ora file.
> 
> Good luck!
> 
> Barb
> 
> 
> ----------
> From:         Tom Schruefer[SMTP:[EMAIL PROTECTED]]
> Reply To:     [EMAIL PROTECTED]
> Sent:         Sunday, June 30, 2002 9:53 AM
> To:   Multiple recipients of list ORACLE-L
> Subject:      ORA-27101 Error
> 
> ORA-27101 = Shared Memory Realm is not available
> 
> I have seen references to this error and how to repair it on UNIX systems,
> but what is to be done on Win2000 when this thing rears its ugly head?
> 
> 
> 
> -- 
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> -- 
> Author: Tom Schruefer
>   INET: [EMAIL PROTECTED]
> 
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Baker, Barbara
  INET: [EMAIL PROTECTED]

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