Error while execution powershell code on System Center Virtual Machine Manager

Question

I'm facing an issue of getting all vms configuration ( using Get-ScVirtualMachine command) into an array from an input file.

The code is this one below

$VmsList = Get-Content C:\VmsList.txt
foreach($vm in $VmsList){

$Result += Get-SCVirtualMachine -Name $vm

}

And I have this error

Method invocation failed because [Microsoft.SystemCenter.VirtualMachineManager.VM] does not contain a method named 'op_Addition'.

At line:3 char:1

• $Result += Get-SCVirtualMachine -Name $vm

•  + CategoryInfo: InvalidOperation: (op_Addition:String) [], RuntimeException + FullyQualifiedErrorId: MethodNotFound

Method invocation failed because [Microsoft.SystemCenter.VirtualMachineManager.VM] does not contain a method named 'op_Addition'. At line:3 char:1

• $Result += Get-SCVirtualMachine -Name $vm

•  + CategoryInfo: InvalidOperation: (op_Addition:String) [], RuntimeException + FullyQualifiedErrorId: MethodNotFound

Get-SCVirtualMachine: Cannot validate argument on parameter 'Name'. The character length (0) of the argument is too short. Specify an argument with a length that is greater than or equal to "1", and then try the command again. At line:3 char:39

• $Result += Get-SCVirtualMachine -Name $vm

•  ~~~

  • CategoryInfo: InvalidData: (:) [Get-SCVirtualMachine], ParameterBindingValidationException
  • FullyQualifiedErrorId: ParameterArgumentValidationError,Microsoft.SystemCenter.VirtualMachineManager.Cmdlets.GetVMCmdlet

Answer 1

I forgot to declare the array $result = @()

I resolved the issue.