Read-only user login GUI and get an error "Feature is not implemented".
This error is returned by NetScaler when executing command "show system session" in GUI.
All the commands "show system xxx" are not included in built-in read-only Command Policy, so read-only user get this error after login GUI by default.
> show system cmdPolicy read-only
Command policy: read-only Action: ALLOW
cmdspec: (^man.*)|(^show\s+(?!system)(?!configstatus)(?!ns ns\.conf)(?!ns savedconfig)(?!ns runningConfig)(?!gslb runningConfig)(?!audit messages)(?!techsupport).*)|(^stat.*)