Iggorent Nube

I am using Autodesk 123D Design to create a dimensional shape which has an enclosed ball. The ball is slightly smaller than the container it is within so I would like it to print unattached.. When Z-Suite loads the .stl the ball is missing. Is there some way this can be done?

I have seen several videos of ball bearings encased in objects, but I don't have a clue how to do it.

Attached is a pic of the item.

Addendum: The ball appears in Meshmixer. Trying to upload the .123dx file I get a message saying "You are not permitted to upload this kind of file"



Shifter Housing.JPG

you could also upload the .123dx file