A connection could not be made to the SQL Server instance

Error code


Applies to



BackupAssist v6 and later


A connection could not be made to the SQL Server instance - it could be unavailable or authentication details may have changed


This error will require the assistance of BackupAssist technical support to identify the specific cause of the error and the correct way to proceed. Please send technical support a copy of the BackupAssist diagnostics file using the steps provided in the Resolution section below.

To send us diagnostic information, please follow these steps:

  1. Open BackupAssist.
  2. Click on the Help menu at the top of the console.
  3. Select Feedback and Support... from the drop down menu.
  4. Click on Contact Support.
  5. Enter the details asked for.

Make sure the tick box stating 'Submit system diagnostics to help our support team with your query' is ticked. This will zip all your BackupAssist settings so that we can review these specifically for your environment.

Last updated


Further assistance

18th Mar 2015

16th Mar 2007

BackupAssist Support page