I am trying to validate the select option input value.
I am currently able to validate the value using AT SELECTION SCREEN event.
But the problem is this validation occurs only after clicking the execute button.
Now the requirement is: The validation must happen right immediately after i jump to another field in the screen.
i.e once i enter the value in select options field and if i am going to enter the value in another field an error message should state that Invalid value.