Validation problem for form_upload

[eluser]xwero[/eluser]

Code:

// checking for errors + building error string
$errorstring = false;
if (!$this->upload->do_upload(’csvFile’))
{
$errorstring = $this->upload->display_errors();
}
if ($this->validation->run() === FALSE)
{
    $errorstring .= $this->validation->error_string;
}
// take appropriate action
if($errorsting)
{
   // errors action
}
else
{
  // success action
}