getting Create Error when using Powershell

Question

I am receiving this error on following line

Exception calling "Create" with "4" argument(s): "Value cannot be null. Parameter name: parentFolder" At x:\Dev\PowerShell\MoveFiles2DocSet.ps1:29 char:91 + $newDocumentSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create <<<< ($docLib.RootFo lder,$DocSet,$cType.Id,$docsetProperties) + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodException

$newDocumentSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create($docLib.RootFolder,$DocSet,$cType.Id,$docsetProperties)

$siteURL="http://intranet.colgate.com/sites/blazingWhite"          
$docLib = "NewProduct"
$site=Get-SPSite $siteURL
$web=$site.RootWeb
$collFiles=$web.GetFolder($docLib).Files
$count=$collFiles.Count
while($count -ne 0)
{
$item = $collFiles[$count-1].Item
## Create document set if it does not exists
$DocSet = $item["CounterParty"]
$DocSetURL = $siteURL + "/" + $docLib + "/" + $DocSet
$docLibURL = $siteURL + "/" + $docLib
[Microsoft.SharePoint.SPFolder]$targetFolder = $web.GetFolder($DocSetURL)
[Microsoft.SharePoint.SPFolder]$doclibFolder = $web.GetFolder($docLibURL)
Write-Host ""
Write-Host $DocSet
Write-Host $targetFolder
Write-Host $doclibFolder

  if (-not $targetFolder.Exists)
    {   # Create Doc Set    
        # Get Document Set Content Type from list   
            $cType = $web.ContentTypes["Document Set"]
        # Create Document Set Properties Hashtable          
            [Hashtable]$docsetProperties = @{"Title"=$DocSet}
            $docsetProperties = @{"Description"=$DocSet}
            $docsetProperties = @{"CounterParty"=$DocSet}

            Write-Host $cType.Id   
            Write-Host $docsetProperties
            Write-Host ""
        # Create new Document Set

        $newDocumentSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create($doclibFolder,$DocSet,$cType.Id,$docsetProperties)
        Write-Host "Document set created " $newDocumentSet

        if($newDocumentSet.Exists)
        {
            # changing folder type to Document Set type
            $newDocumentSet.Item["ContentTypeId"] = $cType.Id
            $newDocumentSet.Item["HTML File Type"] = "SharePoint.DocumentSet"
            $newDocumentSet.Item.Update()
        }

    } 

# move file(s) to the document set
    Write-Host "$DocSet is the doc set. $collFiles[$count-1].Name is name"
    $collFiles[$count-1].MoveTo($siteURL + "/" + $docLib + "/" + $DocSet + "/"  + $collFiles[$count-1].Name, $true)                       
$count--
}

#dispose:
    $web.Dispose();    
    $site.Dispose();

Edit:

The above code is working except document set looks like Folder instead of blue doc set icon. Can anyone shed some light on this please.

Answer 1

Just by looking at your code.

Create($docLib.RootFolder,$DocSet,$cType.Id,$docsetProperties)

and $docLib is string?

$docLib = "NewProduct"

maybe this would work

Create($targetFolder,$DocSet,$cType.Id,$docsetProperties)

since

[Microsoft.SharePoint.SPFolder]$targetFolder = $web.GetFolder($DocSetURL)

Answer 2

I'm kind of late to this particular party, but while researching my own issue with document sets appearing as simple folders I came across this blog entry ( http://aknauer.blogspot.com/2011/06/document-sets-und-powershell.html ) which contained this valuable nugget:

"It is also important that you select the content type $cType from the collection of the list and not from the collection of the Web. Otherwise, rather than just a document set a new folder is created."

I switched my content type assignment from the web collection (as Mala had done) to the list collection (as Andreas suggests) and my problem was resolved.