only one question should be answered in a question group

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3 years 7 months ago #98610 by first
I have display order group by group and I have two multi choice questions (D1 and D1Other) in a group .I want only one question must be answered. I have validation equation (((count(that.D1.NAOK)) >0) || ((count(that.D1Other.NAOK)) >0)) so that at least one of them should be answered .Can some one suggest how can I modify this equation so that only one question must be answered?

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3 years 7 months ago #98617 by first
(((((count(that.D1.NAOK)) >0) || ((count(that.D1Other.NAOK)) >0))) && (!(((count(that.D1.NAOK)) >0) && ((count(that.D1Other.NAOK)) >0)))) should work fine:)

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