Tutorial: How to convert a .Step-File to an independent .CatPart-File in Catia V5

This Tutorial shows you how to convert a .stp-file (dead solid) to an independent .catpart-file (iso-constrained) in Catia V5.
Using project/intersect 3D-Elements.

Answered with a tutorial: https://grabcad.com/tutorials/tutorial-how-to-convert-a-step-file-to-an-independent-catpart-file-in-catia-v5

fastest way to convert .stp file to .catpart file:
- Open .stp file
- Save as CatProduct
- Select the object that will change to an independent
- Choose TOOLS > GENERATE CATPART FROM PRODUCT > OK
- Save as CatPart
- DONE :)

i have igs fileand tried to convert into part model ther s a problem .. i could not convert by several process i attain.. guys anyone can heli Nd i attached my file into ghis

'C:\Users\HP\Downloads\steering-knuckle-2.snapshot.2.zip'
Open failed due to invalid or inconsistent extension type
what should i do for this error ...?