Vista - Removing Hyper-V VMs From a Cluster

Hello All,

I want to say up front that this is a programming question and I'm not sure
if this is the correct newsgroup to post this question in, but I can't seem
to find one that fits my question. I figured I would try here first - if
there's a more appropriate group, please let me know.

Our organization has written a VBScript that automates VM deployment. It
exports an existing VM image, re-imports and renames it, syspreps it and
then adds the new VM to a Server 2008 Datacenter Edition 64-bit failover
cluster. This script works fine. There is a second script (VBScript again)
that is _supposed_ to do the reverse - it removes the VM from the cluster
and then cleans up any left over VM directories and files. Unfortunately
trying to delete the cluster resource returns a "generic failure
(-2147217407)". The odd thing is that it does actually remove the VM from
Hyper-V, it just doesn't remove the cluster resource.

A snippet of the "destroy VM" script around where it fails is below:


Set wmiVirt = GetObject("winmgmts:\\.\root\MSCluster")
Set clustVmConfig = wmiVirt.ExecQuery("SELECT * FROM MSCluster_Resource
WHERE Name LIKE '%" & vmName & "%' AND Type = 'Virtual Machine
Configuration'").ItemIndex(0)
Set clustVm = wmiVirt.ExecQuery("SELECT * FROM MSCluster_Resource WHERE Name
LIKE '%" & vmName & "' AND Type = 'Virtual Machine'").ItemIndex(0)

' validation of VM UUID to cluster resource and offlining of VM happens here

clustVmConfig.TakeOffline
clustVmConfig.DeleteResource ' this call removes the VM from Hyper-V and
returns the "generic failure" error
clustVm.DeleteResource ' this call fails as well with the same error message


What we're trying to accomplish via our script is obviously possible - the
Failover Cluster Manager interface does it without issue. Any ideas as to
why invoking the process would fail when called from VBScript? I'm
completely open to the possibility that I've pooched the call somehow, but
if that's the case, could you provide an example of the correct way to
perform the operation (or a reference to an example on-line)?

Thanks,

dln