try to enable under sql server configuration the TCP/IP protocol and enable and start the sql service browser.
The Uniprint 8.3 installer is looking for the MS SQL server and instance. If no INSTANCE is specified, the default MSSQLSERVER instance is used. The SERVER can be represented by a short name, a FQDN, or an IP address. Here are a few examples
- SERVERNAME or IPADDRESS (for the default MSSQLSERVER instance)
- SERVERNAME\INSTANCENAME (such as SERVER\SQLEXPRESS)
...and also, the TCP/IP and Named Pipes protocols should be enabled.
Thanks for the help folks - it turned out to be a combination of Richard's answer and the fact that the password for the Pharos account on the SQL server was incorrect.