error management in the verification panel

[Gattabuia]

Hello, everyone!
I developed this model through subd, making "verification" result these errors which I do not understand the origin, attach photos of the window.
I also tried to send it to the press and they told me that the error "no surface object to be exported", to what could be due?
Thank you for your help!

 

[TonyEsp]

You got it? in case negative can you attach the .3dm file?

 

[Gattabuia]

unfortunately I couldn't solve, here's the file and thank you very much for the answer

 

[TonyEsp]

I didn't find mistakes, stupid question, did you convert the subd body into nurbs before working on it? how to send it to the press?

 

[Gattabuia]

no I worked only on subd and tried to send it to the press, once they warned me that the model was nonexistent I tried to convert it into nurbs but gave the same error (in both cases did not allow me to calculate the volume), so I returned to the starting point canceling the nurbs.

the company that sent me the model in print sent me this photo with the error that gives the model.

They contacted me today saying they were able to print them, so at this point I imagine they had problems, I don't know

 

[TonyEsp]

Yes, it is a problem to them, in fact among things they had rhino 6 while you have version 7

 

[Gattabuia]

Thank you very much for your answer