title: Passing filepath parameters to function
body: <p>Below mentioned code is giving error, and I'm not able to troubleshoot issue. Can anyone please help, we are just passing SourceFile and DestinationFile location to this function...</p>
  
  <pre class="lang-cs prettyprint-override"><code>ProcessDocumentsData "D:\Files\Scan1.doc","D:\Files\Scan1.csv"
  
  Clear-Host
  function ProcessDocumentsData {
      Param(
          [string]$SourceFile,
          [string]$DestinationFile
      )
  
      $DestinationFileName = $DestinationFile
      $SourceFileName = $SourceFile
      $tableNum = 13
  
      $delimiter = ','
      $objWord = New-Object -Com Word.Application
      $objWord.Visible = $false # $false
      $objDocument = $objWord.Documents.Open($SourceFileName)
      $LETable = $objDocument.Tables.Item($tableNum)
      $LETableCols = $LETable.Columns.Count
      $LETableRows = $LETable.Rows.Count
  
      $RawCSV = for($r=1; $r -le $LETableRows; $r++) {
          $content= @()
          for($c=1; $c -le $LETableCols; $c++) {
              #Write-Host ("R:{0},C:{1}" -f $r,$c)
              $content += ("`"{0}`"" -f $LETable.Cell($r,$c).Range.Text -replace "(`r|`n|`t)|$([char]7)?")
          }
          $Content -join $delimiter
      }
      $Csv = $RawCSV | ConvertFrom-Csv
      $objDocument.Close()
      $objWord.Quit()
      # Stop Winword Process
      $rc = [System.Runtime.Interopservices.Marshal]::ReleaseComObject($objWord)
      $Csv
      $Csv | Export-Csv $DestinationFileName -NoTypeInformation
  }
  </code></pre>
  
  <p>I'm getting the following error:</p>
  
  <pre>
  ProcessDocumentsData "D:\Files\Scan1.doc","D:\Files\Scan1.csv"
  
  Command failed
  At line:7 char:1
  + $objDocument = $objWord.Documents.Open($filename)
  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo          : OperationStopped: (:) [], COMException
      + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException
  
  You cannot call a method on a null-valued expression.
  At line:8 char:1
  + $LETable = $objDocument.Tables.Item($tableNum)
  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
      + FullyQualifiedErrorId : InvokeMethodOnNull
  
  The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
  At line:21 char:1
  + $objDocument.Close()
  + ~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo          : OperationStopped: (:) [], COMException
      + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException
  </pre>