Dear Sir/Madam,

When i am trying to start our hospital software based on SQL server 2000, it shows Following Error.

Search Condition is not valid, (DBNETLIB) ConnectionOpen (connect()).  SQL server does not exist or excess denied. Due to Fetch data.

I run our software in Windows 8.1, while it smothly runs in previous version of Windows XP and 7

Please do the good.

Please confirm if SQL Server is running state. Also there are many causes for this error.

Please refer: https://support.microsoft.com/en-us/kb/328306

First see if SQLServer is up and running

Go to start-> run in machine where sql is installed and type services.msc

In services list check if SQLServer service is present and is running. If not started, start it and make start mode as Automatic