SQL Server 2012 Service Pack 2 Configuration file path: is empty
of Bootstrap to find the configuration file this upgrade is going to use? This is something that is odd as a majority of our current installations is automated using a configuration file and a path for the Upgrade files.
Based on your description, I make a test on my computer. When I go to the ‘Ready to update’ page, I also find that the ‘configuration file path’ box is empty, below is my screenshot. This is a normal phenomenon during the installation of SQL Server Service
We don’t need to find the configuration file from SQL Server setup location, just click the Update button to perform the Service Pack installation. After the update process, I install SQL Server 2012 Service Pack 2 successfully.
Besides, there is also a similar article about installing SQL Server Service Pack for your reference.
Steps to Install SQL Server 2008 Service Pack 1 (SP1):