Create Multiple Document Sets from List - powershell

Question

I need a document set create for every name in this SharePoint 2010 list. The Document set title is the first and last name of the person and the document set has committee name property that needs to be set as well. The committee name comes from the same SharePoint list.
I don't understand wrong with my code:
$ErrorActionPreference = "Stop"
$url = "http://SERVER/etest"
$listName = "Advisory Committee"
$doclib = "TACM Application Docments"
$web = Get-SPWeb $url;
$list = $web.Lists[$listName];
$item = $list.Items;
$item | ForEach-Object {
$fullName = $_['Last Name'] + ", " + $_['First Name']
$committeeName = $_['Committee Name']
$cType = $list.ContentTypes["Document Set"]
[Hashtable]$docsetProperties = #{"Committee Name"=$committeeName}
$newDocumentSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create($doclib.RootFolder,
$fullName,$cType.Id, $docsetProperties)
}
$web.Dispose()
I get the following error:
ForEach-Object : Cannot find an overload for "Create" and the argument count: "4".
At C:\Users\ev\desktop\docset.ps1:10 char:23
+ $item | ForEach-Object <<<< {
+ CategoryInfo : NotSpecified: (:) [ForEach-Object], MethodException
+ FullyQualifiedErrorId : MethodCountCouldNotFindBest,Microsoft.PowerShell
.Commands.ForEachObjectCommand

Answer 1

DocumentSet.Create method expects the first parameter to be a folder (SPFolder type):
parentFolder
Type: Microsoft.SharePoint.SPFolder
The folder in which to create the new DocumentSet object.
In your case you are passing an invalid object $doclib.RootFolder since $doclib is a string variable, probably you want something like this:
$doclibName = "TACM Application Docments"
$doclib = $web.Lists[$doclibName];
$newDocumentSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create($doclib.RootFolder,$fullName,$cType.Id, $docsetProperties)
Example
$url = "http://contoso.intranet.com"
$listTitle = "Documents"
$web = Get-SPWeb $url;
$list = $web.Lists[$listTitle]
$docSetContentType = $list.ContentTypes["Document Set"]
[Hashtable]$docSetProperties = #{}
$docSetName = "Archive"
$docSet = [Microsoft.Office.DocumentManagement.DocumentSets.DocumentSet]::Create($list.RootFolder,$docSetName,$docSetContentType.Id, $docSetProperties)
$web.Dispose()
How to add Document Set content type into library
Go to Library Settings, then click Advanced Settings
set Allow management of content types? to Yesand click Ok button
click Add from existing site content types link and select
Document Set content type, then click Ok button