I'm using Nintex Form 2013. After the form is loaded a user may choose an item from a Lookup List. When an Item is chosen, I have three lookup fields to populate from the Project list based on the item chosen in the Lookup list.
List Item: Project Name
Lookup fields: Project Owner, Project UID, and Project Restriction.
I did find the Runtime function solution using Lookup() and Parselookup(). The answer in this URL explains the solution clearly. https://community.nintex.com/t5/Community-Blogs/Lookup-Runtime-in-Nintex-Forms-for-Office-365/ba-p/7...