Getting op-addition errors while using cim cmdlet

Hi all,

I have a script which uses a couple of cim cmdlets as some of our many servers are still annoyingly W2K8

The script uses two CIM cmdlets ‘win32_networkadapter’ which I need to obtain the network name (Contains vlan info in the name)

The other ‘win32_networkconfig’ pulls the Ip info

Both also pull down the nic reference Id per adapter which I will use later as a reference to tie the to sets of data together

Also as I have issues using both cmdlets with multiple nic results I need to look each returning value to an array but needed to create two arrays to contain the data from each cmdlet, hopefully the script will explain more

So, the script seems to run ok, the first few servers are collected as expected however as soon as I run into a server which is behind a firewall the connection takes some time to time out, a method of how to pre-check and avoid this would be much appreciated although not my main issue currently

After hitting this first unconnectable device something in the script goes a bit awry and on the next connectable device only the first nic is collected and then I receive the following error per connection:

Method invocation failed because [System.Management.Automation.PSObject] does not contain a method named ‘op_Addition’.

At C:\Users\10044677_A\Documents\Scripts\Get-NICs\Get-Nics.ps1:25 char:21

  • $NicDetails1 += $OutputObj1}

  • CategoryInfo : InvalidOperation: (op_Addition:String) , RuntimeException

  • FullyQualifiedErrorId : MethodNotFound

#Below is the actual script I am running…

$NicDetails1 = @()

$NicDetails2 = @()

$FinalList1 = @()

$FinalList2 = @()

$lc = 1

Write-host ‘Getting list of servers from AD, this may take a few moments…’

$Servers = (Get-ADComputer -Filter ‘operatingsystem -like “server”-and enabled -eq “true”‘).Name

foreach ($Server in $Servers) {

if(Test-Connection -ComputerName $Server -Count 1 -ea 0) {

write-host ‘Getting NIC details from’$server $lc ‘of’ ($Servers.count)

$NetAdapter = $null

$NicConfig = $null

$NetAdapter = get-ciminstance -classname win32_networkadapter -computername $Server -filter “NetConnectionStatus = 2” | select netconnectionid,deviceid -ea silentlycontinue

$NicConfig = get-ciminstance -classname win32_networkadapterconfiguration -computername $Server -filter “ipenabled = true” | select ipaddress,ipsubnet,defaultipgateway,index -ea SilentlyContinue

if($netadapter){ }

foreach ($Nic in $Netadapter){

$NicName = $null

$NicID = $null

$NicName = $Nic.netconnectionid

$NicID1 = $Nic.deviceid

$OutputObj1 = New-Object -Type PSObject

$OutputObj1 | Add-Member -MemberType NoteProperty -Name Sever -Value $Server

$OutputObj1 | Add-Member -MemberType NoteProperty -Name AdapterName -Value $NicName

$OutputObj1 | Add-Member -MemberType NoteProperty -Name AdapterID1 -Value $NicID1

$NicDetails1 += $OutputObj1}



foreach ($Nic in $NicConfig){

$NicIP = $null

$NicSubnet = $null

$NicGW = $Null

$NicID2 = $null

$NicIP = $Nic.ipaddress

$NicSubnet = $Nic.ipsubnet

$NicGW = $Nic.defaultipgateway

$NicID2 = $Nic.index

$OutputObj2 = New-Object -Type PSObject

$OutputObj2 | Add-Member -MemberType NoteProperty -Name Server -Value $Server

$OutputObj2 | Add-Member -MemberType NoteProperty -Name IP -Value $NicIP

$OutputObj2 | Add-Member -MemberType NoteProperty -Name SubnetAddresss -Value $NicSubnet

$OutputObj2 | Add-Member -MemberType NoteProperty -Name DefaultGateway -Value $NicGW

$OutputObj2 | Add-Member -MemberType NoteProperty -Name AdapterID2 -Value $NicID2

$NicDetails2 += $OutputObj2}


$FinalList1 += $NicDetails1

$FinalList2 += $NicDetails2

$NicDetails1 = $Null

$NicDetails2 = $null

$lc ++


$FinalList1 | export-csv NicDetails1.csv -NoTypeInformation

$FinalList2 | Export-Csv NicDetails2.csv -NoTypeInformation

So this should produce two csv files, I will look into how I can match the two nic ID values via powershell later if possible as that would be sooo much better than performing a vlookup in excel

Any assistance would be much appreciated

Many thanks all!


The code is a bit over complicated. This returns a single result for each adapter on a system. There is a SystemName property that has the computername, otherwise, you could append that from your computer loop as well. If you assign a variable to the loop, then you don’t need to build the object with += and everything just rolls up to the variable that is returned in the loop. The results in the full script would be in the server loop, but here is an example of how you would join the adapter information:

$NetAdapter = Get-CimInstance -classname win32_networkadapter -computername $Server -filter “NetConnectionStatus = 2” -Property * | Select DeviceID, Name, AdapterType, NetConnectionID, Speed, SystemName, ProductName

$results = foreach ( $adapter in $NetAdapter ) {
$NicConfig = Get-CimInstance -classname win32_networkadapterconfiguration -computername $Server -filter “ipenabled = true AND index = $($adapter.deviceId)” |
Select @{Name=‘AdapterDeviceID’;Expression={$adapter.DeviceID}},



Why did you duplicate your post?

Thanks Rob and apologies Doug, I was changing things around in the script and getting slightly different results re-posted as I thought my earlier post may have been thought of as answered