No validation error message when clicking on a button
Description of the issue
Am running into a problem where I have a field that allows a user to select from a value list. When I select a value and then double click in the field I can change it. So for example, I select "Printer" then double click and change it to "Printe". When I click in the open areas of the layout, I get a message that the the value is not valid (which is good). BUT when I click on a button on the layout, it executes the button (without any error messages). I want an error message so the button does not execute !
Steps to reproduce the problem
An error message that the value is not in value list AFTER I click on any button (and the button does not execute).
The button executes.