I have Entity Model version: 7.0.25.0. I'm facing a problem when adding a procedure that returns sys_refcursor, the Entity Model doesn't always generate a complex type.
Could you please post here or send us a body of your get_items procedure and the DDL script of the related database objects so that we can reproduce the issue in our environment?
Does the problem with generating a complex type persist when you are drag&drop-ing stored procedure on the diagram surface from the Store part of Model Explorer or from Database Explorer?