APM Cannot Access Sesssion Variable Created by Irule

Hello,

I am trying to pass the uri from an irule to the APM via a session variable However, the APM cannot find the variable. Here is the statement to generate the session variable.

 ACCESS::session data set session.user.custom.uri [HTTP::uri]

I can see the variable in the console in Access  ››  Overview : Active Sessions.

dbe31cda.session.user.custom.uri

I can also see it with the session dump command:

sessiondump --sid=dbe31cda | grep custom.uri

dbe31cda.session.user.custom.uri 18 /xxx/yyyy

However, the APM cannot find the variable.

variable "session.user.custom.uri" was not found in the local cache for session "dbe31cda"

 'getSessionVar()': 594: try to get it from MEMCACHED

variable "session.user.custom.uri" for session "dbe31cda" was not found in MEMCACHED

Any ideas?

Jeffrey