Powershell Invoke-Swisverb trouble

Please help.  I"m having trouble trying to unmanage a list of devices.  Below is my script.

When it gets to invoke-swisverb it errors out with this message:

Could not find file 'C:\Users\userid\AppData\Local\Temp\zfye57a-.dll'.

At H:\unmange.ps1:22 char:22

+       Invoke-SwisVerb <<<<  $swis Orion.Nodes Unmanage @("$nodeID",$now,$($myLine[1]),$false)

    + CategoryInfo          : NotSpecified: (:) [], FileNotFoundException

    + FullyQualifiedErrorId : System.IO.FileNotFoundException

SCRIPT

$swis = Connect-Swis #--Credential $creds

$a = Get-Content h:\opt\hd\hostsunmanage.txt

foreach ($line in $a)

   {

   if ($line -ne "")

      {

      $now=[DateTime]::UtcNow

      $line = $line.Trim()

      $myLine = $line.split(",")

      $retStuff = Get-SwisData $swis "SELECT NodeID FROM Orion.Nodes WHERE DNS = '$($myLine[0]).Trim()'"

      $nodeID = "N:$retStuff"

      Write-Host $($myLine[0]) " will be unmanaged from $now util " $($myLine[1])

      Invoke-SwisVerb $swis Orion.Nodes Unmanage @("$nodeID",$now,$($myLine[1]),$false)

     }

   }