New-VM Value cannot be null. Parameter name: source

The following error: “parameter name source cannot be null” is just an exception in the VMWare.VimAutomation.Core module.
With this error its hard to find the actual issue. The version i’ve running:

PS > get-command new-vm

CommandType     Name   Version    Source
-----------     ----   -------    ------
Cmdlet          New-VM 11.3.0.... VMware.VimAutomation.Core

The actual issue is that there is no  “-NetworkName” or -PortGroup parameter is given. So adding this wil fix the issue.

Just curious so i updated the module to the newest available.
Updated VMware.VimAutomation.Core to version: 11.5
Now the error is more clear.

PS > get-command new-vm

CommandType Name Version Source
----------- ---- ------- ------
Cmdlet New-VM 11.5.0.... VMware.VimAutomation.Core

My test command:

$VMhost = get-vmhost -name "TST01"
$DS = Get-datastore -name "DS1"
New-VM -VMHost $vmhost -name "TST01" -Datastore $DS -DiskGB 40 -NumCpu 2 -MemoryGB 8 -DiskStorageFormat Thick

Error: New-VM: PowerCLI could not automatically determine a network to which to attach the VM. Specify a network explicitly using the -NetworkName parameter.

In the newest PowerCli version the error is more clear.
Add a -NetworkName or -PortGroup to fix the error.

Happy Automating

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