Invoke-NcHostVolumeSpaceReclaim does not work on Cluster Shared Volume with DOT 9.1

We are running a Windows Server 2012 R2 Hyper-V Cluster. Since we migrated the storage from 7-mode to cmode 9.1 we are not able to reclaim lun space via the Powershell Toolkit.

Tested the latest releases 4.3 and 4.4 of the Data Ontap Powershell Toolkit. Here is the output:


PS C:\Windows\system32> Invoke-NcHostVolumeSpaceReclaim C:\ClusterStorage\Volume2


Reclaim volume free space

Are you sure you want to reclaim free space on volume C:\ClusterStorage\Volume2\?

[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): y

Invoke-NcHostVolumeSpaceReclaim : SCSI command failed: Illegal request, ASC = 21, ASCQ = 0

At line:1 char:1

+ Invoke-NcHostVolumeSpaceReclaim C:\ClusterStorage\Volume2

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : InvalidOperation: (Smiley Happy [Invoke-NaHostVolumeSpaceReclaim], Exception

    + FullyQualifiedErrorId : QuickReclaimVolume failed,DataONTAP.PowerShell.SDK.Cmdlets.Windows.InvokeNaHostVolumeSpaceReclaim


Any ideas?