1. Check that your gifts.cfg is in the root of the directory where you are running the installation
2. Check that your your workstation user account has full permission to the GIFTS directory
3. Check for multiple instances of gifts.ini on the server. If more than one gifts.ini, make sure that all of the instances of gifts.ini are indicating the same location of your gifts database.
4. Change the path to your GIFTS database in the gifts.ini from a mapped drive to the UNC path, or from a UNC path to a mapped drive.
5.Install the upgrade directly on the server, either by being physically at the server or through Remote Desktop.