Vista - Hyper-v and Powershell

Dear All,

I hope this is the right group and apologies if it isn't.

I need to create a number of Hyper-V Virtual Machines and I thought I would
script it with Powershell. I thought that would be quicker than just creating
them by hand. Ah well I'll know better next time. Anyway, I now have a script
but only works once. When now VMs exist the script works but when I try to
create a second or third VM it fails in various places. The code in each of
the places is pretty much the same so I'll only quote a snippet. Here is the
code to allocate the number or processors.

$VProc = gwmi -namespace root\virtualization
Msvm_VirtualSystemSettingDataComponent | where {$_.PartComponent -like
"*processor*"}
$Proc = gwmi -namespace root\virtualization Msvm_ProcessorSettingData |
where {$_.__PATH -like $($VProc.PartComponent) }
$Proc.VirtualQuantity = $NProcs
$Result = $VSManagementService.ModifyVirtualSystemResources($NewVM_PATH,
$Proc.psbase.getText(1))

When I create the first VM it is fine but when I create a second one I get:

Property 'VirtualQuantity' cannot be found on this object; make sure it exists
and is settable.
At E:\Shared\Hyper-V\Hyper-V Clone.ps1:264 char:7
+ $Proc.V <<<< irtualQuantity = $NProcs
You cannot call a method on a null-valued expression.
At E:\Shared\Hyper-V\Hyper-V Clone.ps1:265 char:94
+ $Result = $VSManagementService.ModifyVirtualSystemResources($NewVM_PATH,
$Pro
c.psbase.getText( <<<< 1))

This has me beaten I'm afraid.

Any advice will be appreciated.
--
Best wishes...
Colin Bruce
Coventry University

Have you seen this:

http://www.codeplex.com/PSHyperv


"Colin Bruce" <ccx004@xxxxxx-THIS-coventry.ac.uk.AND-THIS> wrote in message
news:B2EE4D95-A865-42C1-BD1D-DD1899627646@xxxxxx