Hi Mauricio,
Are you sure you've got the "save as" file type correct when you are in your assembly?, still can't get the model to download, i've tried it a couple of times, no joy....(tip.. the KB size of the file should be smaller when saved as a .step/iges).
Can you take a look into it..:-)

Hi Mauricio,
Sorry, bit of a typo error on my last comment... the .step/iges files are usually bigger not the same as a .part file, maybe the problem is just on this file because one of your other files downloaded fine as a .iges file..

Ok... Sorry, i've selected the sldprt file to upload, not the igs...
It's ok now.

Tks