The message "Connection to the central instance failed" appears when opening the ApexSQL Audit GUI. (4377497)

When opening ApexSQL Audit the “Connection to the central instance failed” message will appear.

There can be various reasons why this message appears:

- The connection between Central and the Domain controller is interrupted
- When the disk space is less than set in the Alert wizard the auditing process will be stopped and mentioned message will appear
- When the user name or password is changed, etc

Steps that need to be done to the ApexSQL Audit start to work:

- Open the Services from the Start menu and stop ApexSQL server-side components host service

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- Then open the Task Manager window and terminate all ApexSQL Audit processes with click on the End task button

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- After that open SQL Server Management Studio Connect to the Central Server and ApexSQLCrd database renamed in for example ArchiveCRD_timestamp

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- When everything is finished, go to this path C:\Program Files\ApexSQL\ApexSQL Audit and click on the ApexSQL.Audit.Installer.exe to start the installation process, or use any other installation file to start the ApexSQL Audit installation process

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- When the installation process is finished, a new ApexSQLCrd will be created, and the ApexSQL Audit should work as intended.