shared memory realm does not exist?

Hi all,

I got the following error message, but it seems the shared memory is active. What's wrong?

Thanks,
Phil

$ sqlplus

SQL*Plus: Release 8.1.7.0.0 - Production on Wed Mar 28 13:36:35 2001

(c) Copyright 2000 Oracle Corporation. All rights reserved.

Enter user-name: system
Enter password:
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist SVR4 Error: 2: No such file or directory

$ ipcs

IPC status from <running system> as of Wed Mar 28 13:36:32 PST 2001 Message Queue facility inactive.
T ID KEY MODE OWNER GROUP Shared Memory:
m 0 0x50000e9b --rw-r--r-- root root Semaphores:

The /etc/system is defined as:

set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10
set semsys:seminfo_semmni=100
set semsys:seminfo_semmsl=100
set semsys:seminfo_semmns=200
set semsys:seminfo_semopm=100
set semsys:seminfo_semvmx=32767
set msgsys:msginfo_msgmap=1024
set msgsys:msginfo_msgmax=8192
set msgsys:msginfo_msgmnb=65535
set msgsys:msginfo_msgmni=1024
set msgsys:msginfo_msgssz=2048
set msgsys:msginfo_msgtql=1024
set msgsys:msginfo_msgseg=4096
-----------------------------------------