SharePoint

function addWebPartToPage($siteURL, $pageURL, $webpartName, $listName, $solutionName, $destinationZone, $zoneIndex)
{

$web = Get-SPWeb $siteURL
$file = $web.GetFile($pageURL)

if($file.Exists)
{
    try
    {
        checkOutPage($file)
        $list = $web.Lists[$listName]
        $wpManager = $web.GetLimitedWebPartManager($web.Url + $pageURL,[System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared);
        $webPartListItem = $list.Items | where {$_.Title -eq $solutionName}
        $xmlReader = New-Object System.Xml.XmlTextReader($webPartListItem.File.OpenBinaryStream());
        $errorMsg = ""

        //breaks here:           
        $webPart = $wpManager.ImportWebPart($xmlReader, [ref]$errorMsg)
        $wpManager.AddWebPart($webpart,"$destinationZone",$zoneIndex)

    }
    catch
    {
        $ErrorMessage = $_.Exception.Message    
        $returnVal = 1          
    }
    finally
    {
        checkInPage($file)

        $pweb = [Microsoft.SharePoint.Publishing.PublishingWeb]::GetPublishingWeb($web)
        $page = $pweb.GetPublishingPage($pageURL)
        approvePage $page

        #close the xml reader
        if($xmlReader -ne $null)
        {
            $xmlReader.Close()
        }

        $wpManager.Dispose()
        $web.Dispose()

        [GC]::Collect()     
        checkIfFailed $returnVal
    }
}

web.Groups("AR Test Site Members").AddUser(newStaff.User)