I have a Drupal install at n:/.

I defined some site aliases in the file aliases.drushrc.php defined in the drush dir.

When I run
drush sa
I get

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

m:\drush>drush sa
Unable to create N://.drush.                                             [error]

$aliases['dev'] = array(
      'root' => 'm:/polamblue',
      'uri' => 'http://polamblue.localhost:8080/',
    );
$aliases['prod'] = array(
      'root' => '/home3/polamor1/public_html',
      'uri' => 'http://www.polam.org/',
    );

$aliases['macdev'] = array(
      'root' => 'm:/tonymac/public_html/tonymac',
      'uri' => 'http://tonymac.localhost:8080/',
    );
$aliases['macprod'] = array(
      'root' => '/home3/tonymacc/public_html/drupal',
      'uri' => 'http://www.tony-mac.com/drupal/',
    );
Unable to create N://.drush.                                             [error]

I have no idea where to start looking for this error. Googling brings up nothing.
Any help greatly appreciated.

--

Anthony Stefan Maciejowski