Hi,
In my survey, I have a question that is only displayed based on answers to two other questions.
How to make this mandatory question when it appears ?

Thank you for your help.

expression manager

or condition editor GUI

Hi Denis,

In "Relevance equation" i have (display conditions) :
and i try in "Validation" :
but it does not work
I'm still newbie with LimeSurvey

ANd why you don't just check Mandatory to this question ?

I fully expected the display conditions didn't work when the question was mandatory.
I'm really a newbie and a "boulet" (in french in the text)

Thank's a lot Denis