This tutorial is to provide a guide for modifying a CATIA file containing a "dumb" solid. (The reader should be familiar with basic CATIA Part Design commands) This tutorial is to respond to a recent question asked by Nouman Khalid: "This dump solid is generated from a STL and i am given a .STP file. I want all the blades to be similar to generate a reference model for modal analysis. I want the encircled blade to be copied all over rotor. Please guide how this can be done."