can i use trigger value ="UNKNOWN" to active my Action?

[zhuwz]

I wan't to monitor my apache server's "httpd" Process.
I use snmp monitor and use the oid "HOST-RESOURCES-MIB::hrSWRunStatus[index,HOST-RESOURCES-MIB::hrSWRunName, httpd.exe]"

and write a trigger like "{192.168.9.94:test.last(0)}#1"

but when i stoped my apache services,the oid Process "httpd" has disappear,then i get this error
"Cannot find index [HOST-RESOURCES-MIB::hrSWRunName] of the OID [HOST-RESOURCES-MIB::hrSWRunStatus[index,HOST-RESOURCES-MIB::hrSW" and trigger value is "UNKNOWN" now.

How can i use trigger value ="UNKNOWN" to active my Action?

[nieuwhier]

I have the exact same question...