The requested URL /em was not found on this server
Oracle Application Server 10g Release 3(10.1.3.1.0) installation issue
I knew immediately when I got to this error page by clicking on Application Server Control from the Oracle SOA Suite welcome page that I must have forgotten to check off the "Configure this as an Administration OC4J instance".
It never occured to me that it would be so easy to recover however as I was imagining something would be missing from the installation. I thought I would have to uninstall and resinstall the SOA Suite since so much is said about remembering to check off the box when installing and almost nothing is documented concerning recovering if you missed it.
As it turns out everything required has been installed.
I followed steps indicated from:
http://download-uk.oracle.com/docs/cd/B31017_01/core.1013/b28940/em_app.htm#CEGEJCGA
On my system I had to modify these 2 files
ORACLE_HOME/j2ee/oc4j_soa/config/server.xml
ORACLE_HOME/j2ee/oc4j_soa/config/default-web-site.xml
In server.xml find ascontrol and set start="true"
in default-web-site.xml find ascontrol and set ohs-routing="true"
Then restart SOA
ORACLE_HOME/opmn/bin/opmnctl stopall
ORACLE_HOME/opmn/bin/opmnctl startall
ORACLE_HOME/opmn/bin/opmnctl status