# An item with the same key has
**URL:** https://forums.powershell.org/t/an-item-with-the-same-key-has/7428
**Category:** DSC
**Created:** [October 28, 2016, 5:48am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428 "2016-10-28T05:48:21Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@bjorn-roalkvam](https://forums.powershell.org/u/bjorn-roalkvam)
#### Post date: [October 28, 2016, 5:48am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/1 "2016-10-28T05:48:21Z")
Hi
Using Server 2012R2 and PowerShell 5.
I have created a custom DSC resource (class 5) for running the SharePoint configuration Wizzard (psconfig).
When trying to use the resource i get:
```
VERBOSE: [vm04]: LCM: [Start Resource] [[PSConfig]psconfig]
VERBOSE: [vm04]: LCM: [Start Test] [[PSConfig]psconfig] **An item with the same key has already been added**.
+ CategoryInfo : NotSpecified: (:) [], CimException
+ FullyQualifiedErrorId : System.ArgumentException,Microsoft.PowerShell.Commands.AddPSSnapinCommand
+ PSComputerName : localhost
VERBOSE: [vm04]: LCM: [End Test] [[PSConfig]psconfig] in 1.1100 seconds.
The PowerShell DSC resource '[PSConfig]psconfig' with SourceInfo '\\share\SharePoint\RoleDataSource\MasterServer.ps1::305::9::Psconfig' threw one or more non-terminating err
ors while running the Test functionality. These errors are logged to the ETW channel called Microsoft-Windows-DSC/Operational. Refer to this channel for more details.
+ CategoryInfo : InvalidOperation: (:) [], CimException
+ FullyQualifiedErrorId : NonTerminatingErrorFromProvider
+ PSComputerName : localhost
VERBOSE: [vm04]: [] Consistency check completed.
The SendConfigurationApply function did not succeed. LCM failed to start desired state configuration manually.
+ CategoryInfo : NotSpecified: (root/Microsoft/...gurationManager:String) [], CimException
+ FullyQualifiedErrorId : MI RESULT 1
+ PSComputerName : localhost
```
What i do in the test method is 1):
Adding the microsoft.sharepoint.powershell snappin:
```
If ((Get-PSSnapin -Name microsoft.sharepoint.powershell -EA "SilentlyContinue") -eq $null)
{
Add-PsSnapin microsoft.sharepoint.powershell
}
```
and 2) running a command to check if servers need to upgrade.
Anyone experienced this kind of fault?
brgs
bjørn
---
### Author:  [@silent-steel](https://forums.powershell.org/u/silent-steel)
#### Post date: [October 28, 2016, 2:57pm UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/2 "2016-10-28T14:57:42Z")
Dont know if this is it, but it sounds like you’re trying to add modules to the session and then use it, and I dont think that’s how DSC works. You need the modules to exist when the session initializes or you wont be able to call any of the functions inside the modules.
---
### Author:  [@bjorn-roalkvam](https://forums.powershell.org/u/bjorn-roalkvam)
#### Post date: [October 29, 2016, 8:44am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/3 "2016-10-29T08:44:39Z")
The reason for adding the sharepoint powershell snapin is that i have a method in the DSCresource that checks if the SharePoint servers need to upgrade.
I have made other modules for sql-operations, where i import-sqlps module without issues though…
I read somewhere that maybe i need to register the sharepoint snapin into my dsc-module manifest…Looking into that.
brgs
Bjørn
---
### Author:  [@bjorn-roalkvam](https://forums.powershell.org/u/bjorn-roalkvam)
#### Post date: [November 1, 2016, 4:57am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/4 "2016-11-01T04:57:29Z")
Ill post the dsc resource class:
```
[DscResource()]
class PSConfig
{
[DscProperty(key)][Ensure]$Ensure
[void]RunPSConfig()
{
Write-verbose -message "Running PSconfig.exe on $env:COMPUTERNAME. "; Write-verbose -message "Expect 4-10 minutes per Host."
CD 'C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\BIN'
$psconfiginfo = .\Psconfig.exe -cmd upgrade -inplace b2b -force -cmd applicationcontent -install -cmd installfeatures
#Check to see if the 6 steps of the psconfig run have run successfully
If($psconfiginfo -like "*Total number of successful configuration settings: 6*")
{
Write-verbose -message "The 6 configuration steps have successfully completed [OK]"
}
Else
{
Write-verbose -message "Error detected, a configuration step has failed, please review the output bellow. Try restarting affecting server and run this script again."
Write-verbose -message $psconfiginfo
Break
}
}
[bool] GetUpgradeStatus ()
{
Add-PSSnapin microsoft.sharepoint.powershell
$Status = (get-spserver $env:computername).NeedsUpgrade
Return $Status
If ((Get-PsSnapin |?{$_.Name -eq "Microsoft.SharePoint.PowerShell"})-ne $null)
{
Write-Verbose "Removing the PowerShell snapin"
Remove-PsSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue | Out-Null
}
}
[void] Set()
{
if ($this.Ensure -eq [Ensure]::Present)
{
Write-Verbose -Message "[Running PSConfig]"
$this.RunPSConfig()
}
elseif ($this.Ensure -eq [Ensure]::Absent)
{
Write-Verbose -Message "[Absent setting has no logical property:-)]"
}
}
[bool] Test()
{
$ServerNeedsUpgrade = $this.GetUpgradeStatus()
$there = $false
If($ServerNeedsUpgrade -eq $true){$there = $true}
If($There -eq $true){Write-Verbose -Message "[Server requires PSconfig to be run]"}
If($There -eq $false){Write-Verbose -Message "[Server does not require PSconfig to be run]"}
if ($this.Ensure -eq [Ensure]::Present)
{
return $There
}
else
{
return -not $There
}
}
[PSConfig] Get()
{
if($this.GetUpgradeStatus() -eq $true)
{
$this.Ensure = [Ensure]::Present
}
else
{
$this.Ensure = [Ensure]::Absent
}
return $this
}
}
```
---
### Author:  [@jrdnrgrs](https://forums.powershell.org/u/jrdnrgrs)
#### Post date: [November 1, 2016, 10:30am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/5 "2016-11-01T10:30:16Z")
From the Microsoft article [https://msdn.microsoft.com/en-us/powershell/dsc/authoringresourceclass](https://msdn.microsoft.com/en-us/powershell/dsc/authoringresourceclass)
> DscProperty(Key): The property is required. The property is a key. The values of all properties marked as keys must combine to uniquely identify a resource instance within a configuration.
Pretty sure you shouldn’t be using the Key attribute on the Ensure property, since there are only 2 values for this and other resources will be using it.
Put your Key attribute on another property
---
### Author:  [@bjorn-roalkvam](https://forums.powershell.org/u/bjorn-roalkvam)
#### Post date: [November 4, 2016, 6:17am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/6 "2016-11-04T06:17:28Z")
Hi JrdnRgrs,
I did what you suggested. Changed the key to another parameter:
```
[DscProperty(mandatory)][Ensure]$Ensure
[DscProperty(key)][string]$Configname
```
However, i get the same fault.
brgs
Bjørn
---
### Author:  [@bjorn-roalkvam](https://forums.powershell.org/u/bjorn-roalkvam)
#### Post date: [November 4, 2016, 6:28am UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/7 "2016-11-04T06:28:01Z")
I’m wondering if it could be connected to loading the sharepoint snapin:
[http://stackoverflow.com/questions/17710233/add-powershell-snapin-for-powershell-module-and-import-multiple-times](http://stackoverflow.com/questions/17710233/add-powershell-snapin-for-powershell-module-and-import-multiple-times)
---
### Author:  [@dotnVo](https://forums.powershell.org/u/dotnVo)
#### Post date: [May 16, 2024, 9:16pm UTC](https://forums.powershell.org/t/an-item-with-the-same-key-has/7428/8 "2024-05-16T21:16:51Z")