I am currently working on a project for an external company, who have sent me a file of their design for modification.

However, the file they sent me is a igs file. When I open it, it comes into solidworks as imported bodies/imported surfaces. As far as I can make out i cannot edit this file.

I then received a second file in an stp format, but i had the same problem.

Is their a way of converting these so that i can edit the original sketch/feature? I want to keep the shape/curves of their design, but I need to edit the dimensions.

If i can get the design tree to display the original sketches, extrudes etc, i should be ok to progress.

All comments would be greatly appreciated.

Thanks, Josh