I recently worked with a customer who was receiving the error below on a Client/Server installation with a standalone SQL instance (not built-in):
 KdoLib: Network I/O error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (Provider: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified) (-1)
After performing a clean install of Kofax 10 on a new workstation, they were unable to open Batch Manager, Administration, etc. The process could be seen in Task Manager, but the window would not open, and after about 20 minutes would show the error above.
To resolve this we first tested the connection to the SQL server using a .udl file. This can be done by creating a blank text file, then renaming the extension to .udl.
Open this new Data Link and fill in the fields for your SQL server and test the connection. If you do not get a success, verify that your server name, login, firewall, etc. are configured properly to access the server.Continue reading