QuickApps 2016: Drop Down Field Validation does not work for IsNotNull. Tagged: field validationThis topic has 1 reply, 2 voices, and was last updated 8 years, 6 months ago by Anonymous. Viewing 1 reply thread Author Posts 03/05/2016 at 9:11 am #7658 AnonymousParticipant Hi Drop Down Field Validation does not work for IsNotNull. Does anybody have any idea about it? 03/05/2016 at 9:17 am #7660 AnonymousParticipant Hi I’m also facing the same issue. Regards This reply was modified 8 years, 6 months ago by AgreeYa Super Admin. This reply was modified 8 years, 6 months ago by Anonymous. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic.