A little thing about GroupCalc

It only works on the RMS.  In hindsight this seems intuitive, but I didn’t figure it out until I banged my head on it for hours.  GroupCalc creates these neat Containment relationship objects using all kinds of cool query abilities.

But only if you target an object that is managed by the RMS HealthService.  Sigh….

Just for posterity (and web searches) here’s what the error looks like on the remote agent.

Event Type:    Error
Event Source:    HealthService
Event Category:    Health Service
Event ID:    4508
Date:        6/3/2009
Time:        11:11:02 PM
User:        N/A
Computer:    OMDEV1
Loading managed module type in assembly "Microsoft.Mom.DatabaseQueryModules, Culture="", PublicKeyToken="31bf3856ad364e35", Version="6.0.4900.0"" with type name "Microsoft.EnterpriseManagement.Mom.DatabaseQueryModules.GroupCalculationModule" failed with error code "80FF0001" in rule "MYMP.Discovery.SourceObject_Contains_TargetObject" running for instance "My Object – Source" with id:"{08A72EB6-327D-7E62-FC1C-2A868F13964B}" in management group "OMR2MG".
This may be because the type or assembly could not be found or the type does not have the MonitoringModuleAttribute.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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