If your receive:
<b>
   An error occurred while reconnecting <Driveletter>: to
   \\<Computername>\<Share>

-or-

   Microsoft Windows Network: The network name cannot be found.</b>
it could be because the share name exceeds 12 characters.

To allow your workstation to connect to long share names, if SP3 or greater is installed, navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\Parameters

Add Value name AllowLongShareName as a type REG_DWORD entry and set the data value to 1. The default is 0, which does not allow reconnection to a long share name.

You must shutdown and restart your workstation for this change to take effect.