Gravity Sketch OBJ to Fusion 360 Issue with Editing

[Anonymous]

I am having a bear of a time trying to figure this out, and have been researching throughout the day. If I export a simple cube from Gravity Sketch as an OBJ file, I can easily import it to Fusion 360 and put a hole through it.  However, if I try to do the same cube and convert it to Subdivision Object, export as OBJ, bring it in to Fusion 360 and convert to Brep, I cannot do anything and get an error when trying to edit the cube.  Can you tell me what I am doing wrong?  I have some designs in Gravity Sketch that I would like to modify in Fusion 360.

[Phil.E]

Can you provide an example file for me to look at?

[Anonymous]

Sorry - just saw your fast response.  I would attach it but I am getting an error that says

The attachment's subd cube.stl content type (application/vnd.ms-pkistl) does not match its file extension and has been removed.

I can bring it into Fusion360 and convert to BRep easily of course, but when I try to extrude a circle through it I get an error.  In Gravity Sketch, I can do a normal cube and bring it in.  It is only the SubD items.

[Phil.E]

See if zipping the file or removing the extension works to upload here.

[Anonymous]

See if this works

[Phil.E]

Thanks.

I'm finding the same as you. There must be something going on in your other application that it's producing STL files that do not work well in Fusion. 

Here is my advice:

Check for STL options in your other app - have you tried them all?

Use OBJ / quad mesh - does this work better?

Regarding your comment, I'm still a little unclear about why you are using the workflow that fails. It seems like you have already explored a workflow that succeeds. Can you help me understand why the failing workflow is necessary?

If I export a simple cube from Gravity Sketch as an OBJ file, I can easily import it to Fusion 360 and put a hole through it.