SQL Optimizer error "The type initializer for 'Quest.Tuning.Common.DevExpressRichTextEdit' threw an exception."


Everytime I start SQL Optimizer for Oracle and go to “Plan Control”, it shows this error message “The type initializer for ‘Quest.Tuning.Common.DevExpressRichTextEdit’ threw an exception.”

Does anyone know a fix for it?

Thank you,



You may try this:

  1. Close Optimizer first

  2. Rename this directory: (Example of Win 7 environment)

C:\Users<user name>\AppData\Roaming\Quest Software\Quest SQL Optimizer for Oracle\8.8.0\Layout

  1. Restart Optimizer to check if the problem is resolved

Note that doing the above steps will reset all your current layout in UI.

If this doesn’t help, please contact Support to have a closer look of this problem. You may want to send them a Support Bundle to start with the investigation. To generate the Support Bundle, follow these steps:

  1. Launch Optimizer

  2. Click Help | Support Bundle (This will create a new Support Bundle tab in the application)

  3. Click to Plan Control to repeat the problem

  4. After problem repeated, click to the Support Bundle tab to save the Support Bundle and contact Support.