@Is member to validate a dialog list field

Hi All,

I need to write a validation for a field (dialog list), which has certain values like Dont Know, Yes and No.

If the user selects Dont Know along with either Yes or No, on saving the document, a validation should appear prompting the user that either select dont know or any other value.

I am trying to use @Ismember and @Element…but have not been able to pass the validation.

Any help on this would be greatly appreciated.

Thanks

Subject: RE: @Is member to validate a dialog list field

@If(@Thisvalue= “Don’t know” & @Thisvalue != “Don’t know”; “Don’t select ‘Don’t know’ and also another value”; @Success)

Subject: @Is member to validate a dialog list field

assuming your field is called TOTO

@IF(TOTO*=“Dont Know”:“Yes”:“No”;@TRUE;@FALSE)

is your field multivaluated?