Exceptional handles in checkbox

Hi Everyone..

I need an assistance on how to apply exceptional handler on checkboxs.. I dont want the client to apply MULTIPLE SECTION..Please tell me which logic to u

Thank you in advance 



On check box checked event use list filter action  based on your checkbox variable=true and then check count and apply validation accordingly.



Hi Tafadzwa,

I'm presuming you are using OutSystemsUI; Why don't you use the "Radio Group" widget for this requirement? A radio group consist out of multiple radio button of which only one can be selected at the time. 

Kind regards,

Vincent Koning