I have uploaded files for a top level assembly into a Workbench project -- my first time using this feature. The files were created in Creo and I exported them as igs. All of the individual parts come through well enough, but I can't view any of the sub-assemblies. I'm working with another student creating a users manual for the complete assembly (about 400 files), and she does not have CAD of any type. She was planning to get screen shots from GrabCAD for illustrations. I need to know if a) if I am doing something wrong so that the assemblies won't appear, or b) if there is a better program to do this. I've used Creo/ProE for years but rarely needed to export files, so I am not that familiar with the process.