Hi,
Basically you need to apply a similar rule to the validation as you do for hiding the panel.
Example:
If you hide a panel when a choice control is yes : Choice == "Yes"
You have a control in the panel that does not need validation when Choice == "Yes"

Validation would be and(isNullorEmpty({Self}),equals(Choice,"No"))

If choice is No the panel will not be hidden and therefore the control will need validation.

Sample Classic form attached to demonstrate this functionality.

I applied what you've told me and it worked! 

Thank you!

Hi,

I tried to use this in Responsive form and didn't work. 

does it work diffrent in responsive form than Classic form.

Thank you for your help.

@rkbud This works the same in classic or responsive forms.

In my case, Hidden field is connected to sharepoint column and non required column. 

@SimonMuntz Sorry if i wasn't clear on my previous post. I am trying to validate hidden date field when that field is shown on the form. I have two column i.e. Column A with multiple dropdown(values A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P) and  Column B (date field). Column B  field is shown when dropdown on Column A are A,B,C,D,E,F,G,H,I only. 

I have formula to hide the field as Column A!="A"&&Column A!="B"&&Column A!="C"&& Column A!="D"&&Column A!="E"&&Column A!="F"&&Column A!="G" && Column A!="H"&&Column A!="I".

I get validation to work when chosing only one value ie. equals(Column A, "A")&&isNullOrEmpty({Self}). The issues is if i tried to add other values in validation. It won't work. I am trying to minimize writing other eight rules for the same field. 

Thank you in advance for your help.

I used 'or' expression and got it to work.

or(equals(Column A, "A"),or(equals(Column A, "A")))&&isNullOrEmpty({Self})

Hi all,

need to seek your expertise.

I have a Nintex form with two fields as follows:

Accessby : drop down field

Approval : people field (hidden by default, shown only based on the value of Accessby)

1. I need to hide Approval by default and show Approval field only when Accessby is showing 3 values e.g. "Cat1" "Cat2" "Cat3" (applied hide rule which is working fine)



2. When Approval field is shown, I want to make sure users fill in at least one person and not leave as empty field.

I tried the following at the Rule section of the Approval field, but the system does not do Step 2 above, what is the correct formula to ensure that the Approval field is not empty when shown? :

1. and(isNullOrEmpty({Self}), or(equals(Accessby, "Cat1"), equals(Accessby, "Cat2"), equals(Accessby, "Cat3")))



2. isNullOrEmpty({Self}) and (Accessby == "Cat1" or Accessby == "Cat2"or Accessby == "Cat3") 



3. isNullOrEmpty({Self}) && (Accessby == "Cat1" || Accessby == "Cat2" || Accessby == "Cat3") 

When I tried isNullOrEmpty({Self}) alone, the system immediate prompt me that the Approval field is empty even though the Approval field is hidden (note that I did not tick the "validate when hidden")