# I have a doubt on Validate rule **URL:** \ **Category:** User Experience\ **Tags:** 8-7-5, user-experience\ **Created:** [October 25, 2023, 4:17pm UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250 "2023-10-25T16:17:23Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![kirti](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kirti](https://forums.pega.com/u/kirti)\ **Post date:** [October 25, 2023, 4:17pm UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/1 "2023-10-25T16:17:23Z")
Hi Guys, In one section i need to add error message , in that section we have 3 properties all are having radio button selection . Without select any one of the radio button and click on continue we will get the error message.so i used validate rule in flow action in validate rule i mentioned X==“” Under X we have to select 1,2, and 3 Y==“” under y we have to select 1,2, and 3 Z==“” Under Z we have to select 1,2, and 3 if it’s null show the error message. In screen i have X value and select 2 i click on continue screen does not go Forword, because in that work page Y and Z also Null. How to write validate rule. Please help me. Thanks in advance! ---
**Author:** ![Anoop\_Krishna](https://yyz2.discourse-cdn.com/pega/user_avatar/forums.pega.com/anoop_krishna/32/23458_2.png) [@Anoop\_Krishna](https://forums.pega.com/u/Anoop_Krishna)\ **Post date:** [October 25, 2023, 6:51pm UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/2 "2023-10-25T18:51:18Z")
@kirti the logic should be like this-\> A==“” && B==“” && C==“” Throw error message. If you are using expression evaluates to true then above condition as it.. If different labels, then A=“” , B=“”. C=“” IN LOGIC, A && B && C This means if none of the radio button property is having any value then throw error message. ---
**Author:** ![kirti](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kirti](https://forums.pega.com/u/kirti)\ **Post date:** [October 26, 2023, 5:27am UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/3 "2023-10-26T05:27:07Z")
@Anoop Krishna Sorry can’t understand krishna , Actually X, Y and Z are different properties. I need condition if any one of the properties not holding any value, then throw error message. I am using this condition expression evaluates to true as of now. ---
**Author:** ![Anoop\_Krishna](https://yyz2.discourse-cdn.com/pega/user_avatar/forums.pega.com/anoop_krishna/32/23458_2.png) [@Anoop\_Krishna](https://forums.pega.com/u/Anoop_Krishna)\ **Post date:** [October 26, 2023, 7:35am UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/4 "2023-10-26T07:35:53Z")
@kirti ya correct, then we need to check if any one of these properties is having blank values. A==“”|| B==“” || C==“” This logic will check if any one of these properties have blank value or not. ---
**Author:** ![kirti](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kirti](https://forums.pega.com/u/kirti)\ **Post date:** [October 26, 2023, 9:35am UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/5 "2023-10-26T09:35:39Z")
@Anoop Krishna Thank you krishna ---
**Author:** ![kirti](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kirti](https://forums.pega.com/u/kirti)\ **Post date:** [October 26, 2023, 8:21am UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/6 "2023-10-26T08:21:23Z")
@Anoop Krishna It’s not working krishna Actually, my requirement is X and Y and Z 1 1 1 2 2 2 3 3 3 Based up on condition in that screen only one set available if x available y and z not available in Ui, But in backend all are available in same page workPage. if X set is enabling X==“” throw error message, but here Y and Z null.so screen not continue to next page ---
**Author:** ![Anoop\_Krishna](https://yyz2.discourse-cdn.com/pega/user_avatar/forums.pega.com/anoop_krishna/32/23458_2.png) [@Anoop\_Krishna](https://forums.pega.com/u/Anoop_Krishna)\ **Post date:** [October 26, 2023, 8:36am UTC](https://forums.pega.com/t/i-have-a-doubt-on-validate-rule/5250/7 "2023-10-26T08:36:34Z")
@kirti okay got you. Can you write this in validate rule and please let me know if it’s working. I will help you understand post that. A==“” && B==“” && C==“”