To Open a CATIA, Inventor, NX, SolidWorks, or Creo Elements/Direct Model
1. Click > 
Open or open an assembly and click > 
Assemble > Assemble. The File Open or the Open dialog box opens.
Open or open an assembly and click > Assemble > Assemble. The File Open or the Open dialog box opens.2. Set Type to All Files (*) or one of the following file formats:
◦ Inventor Part (*.ipt)
◦ Inventor Assembly (*.iam)
◦ CATIA V5 CATPart (*.CATPart)
◦ CATIA V5 CATProduct (*.CATProduct)
◦ CATIA V4 Model (.model, .exp)
◦ NX File (*.prt)
◦ SolidWorks Part (*.sldprt)
◦ SolidWorks Assembly (*.sldasm)
◦ Creo Elements Direct (.bdl, .pkg, .sdp, .sda, .sdac, .sdpc)
3. Browse and select the part or assembly model that belongs to the format that you set as the file-type.
 | To open a Creo Elements/Direct part or assembly, select an *.sdpc or *.sdac content file. |
4. Click Open to open the part or assembly as a non-Creo or a Creo Elements/Direct model. The Component Placement tab opens when you assemble the non-Creo or the Creo Elements/Direct model as a component of an existing assembly.
5. Add placement constraints to position the component in the assembly and close the Component Placement tab.
The non-Creo or the Creo Elements/Direct model or component displays the source model name, file extension, and the PTC-generated CAD icon on the Model Tree. If you opened a part model that contains multiple bodies, the Bodies folder is the first node of the non-Creo part or each part component of the assembly on the Model Tree. The Bodies folder contains the solid bodies of the non-Creo part or part component.