Hi Folks,
Following the 7.11.15 upgrade (in my instance from 7.11.13) there is a SQL syntax error in modules/Audit/Audit.php
Specifically line 135 includes a call to the MySQL IFNULL function, in a SQL Server install this will fail with a syntax error ending [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]‘IFNULL’ is not a recognized built-in function name. (ODBC driver will be specific to your install).
To correct this and restore Change Log functionality it is necessary to change the IFNULL to the SQL Server function ISNULL.
Regards,
Ian