Invoke-CCMSoftwareUpdate gives status False

hello, 
whats could be the reason for getting the below results ? 
There are  3 pending OS updates on the host1 but im not able to trigger the installation :(

Get-CCMSoftwareUpdate -ComputerName host1 | Invoke-CCMSoftwareUpdate

ComputerName  Invoked
------------  -------
host1   False
host1   False
host1   False