External OData Service (non SAP system)

I'm working in building in using Gateway (Hub) to integrate in our backend system (ECC) with another external application. That application provides an OData Service. Has anybody done this before?

I'm using Northwind service as reference.

This is the steps I have followed:

- Create an HTTP destination to the system where the ODATA service/model resides

- Create a new project via SEGW

- Use the option Redefine OData Service, bringing the model from the HTTP destination I have created and I'm able to bring the model

- I generate the runtime objects with no issue

However when I try to Add the service via /IWFND/MAINT_SERVICE, I receive the error "No Model assigned to Service"

Any help will be welcomed.