We have successfully been able to link an External Content Type to our Nintex Form. We had issues displaying our content type via a lookup, which we resolved using the following
This was adding a Wildcard filter parameter on the read list item.
However, now we have another issue and I am unsure if this is a SharePoint or a Nintex issue, so apologies! This is mostly I am new to setting up external content types and Nintex.
I have attached as screenshots -
Lookup from the Nintex form
The result when the Nintex form is submitted i.e. the country is not displayed.
I have looked in the forum but noted the only entry I can find is the following -