I've updated the MySQLi Server Behaviors to prevent this error. Please reinstall and you should be able to test your recordset without errors. It appears there is a bug in DW 2014 that causes it to freeze when there is an error in your SQL syntax, and a bug in our extension that case causing an error whenever you use a "contains" filter. I fixed our bug so that it won't error in that case, but if there is an error it will still freeze since that seems to be a DW bug I can't fix... but technically shouldn't happen when using the simple recordset since the interface should prevent bad queries from being written.