Hi all, I have a constant sum question, and I would like validation to depend on two things: 1. The total must equal a value entered in the previous question 2. If a value has been entered for the “other maths” line, then the text box on that line must not be empty. ! I can do (1) with piped text, using the “must total” validation option, or I can do (2) using custom validation. However, I can’t seem to do both at once. The custom validation option doesn’t seem to have the ability to do anything with the total. Does anyone know how to achieve this?

On your "Other maths" choice, click on the down arrow and select Text Entry Validation/Force Response.

I came across this while trying to find a parallel to a different problem I have. Instead of using the Constant Sum question type, have you tried setting this up in a Matrix question type with a single column, and selecting Constant Sum under the Matrix Type options? You can then select "Must Total" Validation Type and pipe the value you're trying to match from the previous question in the "Choices Must Total" field.!!

Constant sum validation: must total + custom validation

Constant sum validation: must total + custom validation | Experience Community

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