GrasshopperTeklaLink_2018i.1.2 Is later version of Grasshopper-Tekla Live Link, is the best tool for very complex modeling e.g. parametric. It Introduces algorithmic modelling to Tekla Structures environment using Rhino/Grasshopper. The link is a set of Grasshopper components that can create and interact with objects live in Tekla Structures. For this to workout you need Rhino with Grasshopper installed. Rhino 5 onward has a pre-installed grasshopper.