Shared memory error with jcmon

When I attempt to launch jcmon.bat and access local administration, I get the following error:
ERROR => Can't attach to administration shared memory (rc=3) [jcmonxx.c   219]
Any ideas?  I'm pretty sure that server0 is not running, but since I can't log into the Visual Administrator or jcmon I don't know for sure.
Thanks in advance!

Hi all,
jcmon.exe pf=I:usrsapVIKSYSprofileVIK_DVEBMGS00_VIKLAB
You will find the below, see the server0 is stopped. Thats what is not starting in our case, and that is the j2ee engine I suppose. Because the dispatcher and the SDM starts as can be seen. If you attempt to restart the process from the jcom administration menu, it wont because if it did then we would not have this problem in the first place. The sapinst tool is calling this.
============================================================
JControl Monitor Program - Main Menue
============================================================
0 : exit
10 : Cluster Administration Menue
20 : Local Administration Menue
command =>
SAP System Name : VIK
SAP System : 00
MS Host : VIKLAB
MS Port : 3601
Process Count : 3
PID of JControl : 1116
State of JControl : Some processes running
State inside MS : Some processes running
Run Mode : Normal Mode
Admin URL :
Idx
Name
PID
State
Error
Restart
0
dispatcher
3948
Running
0
yes
1
server0
0
Stopped
4
no
2
SDM
4564
Running
0
yes
I think the problem here seems to be the wrong JDK version.
Take this very seriously. I think this might save days of trouble,
SAP faces installation problem if you have an SDK/JDK lesser than 1.4.2_11. I did not take this very seriously and have 1.4.2_10 but then this thread below clearly says that there are problem with installations when you use 1.4.2_10.  Useful for guys stuck in the same hole. This might be the reason why the java server process does not start while the java dispatcher and SDM starts.
The link for this JDk recommendation thread is
8) SAP J2EE-DEP 6.40 certification - JDK requirements
"SAP J2EE-DEP 6.40 certification - JDK requirements "
==>
So please adhere to the following:
Linux 32 Bit + 64 Bit (Itanium)
Windows 32 Bit + 64 Bit (Itanium)
Access to appropriate Sun J2SE Version:
Please use Sun J2SE 1.4.2_09 SDK (or higher 1.4.2 versions after they will become available).
It is not recommended to use versions lower than 1.4.2_09.
Please also do not use J2SE 5.0.
In contrast to the recommendation above please do not use J2SE 1.4.2_10 as it has problems during installation. The problem is under investigation.
The J2SE 1.4.2 SDK is available from
http://java.sun.com .
regards, Vikram

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