How can the time be extended for the Nintex Form to fully load before the conversion occurs?
I tried this on a plain vanilla list and it worked fine, as per Using Nintex Forms with Muhimbi PDF creator for SharePoint | The SharePoint Pub .
Perhaps the difference is the form that times out and shows the "Please wait..." modal dialog has a more complex signature field on it as per New! Easier way to add a signature capture ?
Retrieving data ...