Hi, I am able to get valid output when I query the providers with the fields other than the key fields. For ex: wbemcli ai -ac Xen_SettingsDefineState 'http://root:P@localhost:5988/root/virt:Xen_Processor.CreationClassName="Xen_Processor",SystemName="Domain-0",DeviceID="Domain-0/0",SystemCreationClassName="Xen_ComputerSystem",*virtinvalid="Xen"*' localhost:5988/root/virt:Xen_ProcResourceAllocationSettingData.InstanceID="Domain-0/proc" -Caption -Description -InstanceID="Domain-0/proc" -ElementName -ConfigurationName -ChangeableType -ResourceType=3 -OtherResourceType -ResourceSubType -PoolID -ConsumerVisibility -HostResource -AllocationUnits -VirtualQuantity=16 -Reservation -Limit=0 -Weight=0 -AutomaticAllocation -AutomaticDeallocation -Parent -Connection -Address -MappingBehavior In the above query I supplied invalid parameter *virtinvalid="Xen" *which is not part of the key fields for querying the provider. I think we should be checking our providers to take only the required key fields. Thanks and Regards, Deepti.