PullData Constraint not working in webform

[MattCobb]

I have a 'Participant ID' field that references a csv list of unique codes that will be sent to individuals to complete the survey.  I entered my pulldata formula in the Constraint field for the Part_ID field, and it works flawlessly in Survey123 Connect.  But when I publish to webform (which is how the survey will be accessed), values that match the ID's still return a constraint error.  

I've attached the Survey, the ID.csv, and a screen grab of the webform error.  Thanks for any help!

[ScottMoore__Olympia_]

Here is an example of using pulldata to validate a set of "codes" in a csv.  It works in the webform as well.

[AndrewPadilla]

Thanks for your help Scott. The validation is working well!