Why is my body invalid?

Hey, like the title suggest, I wanted to ask why my body (video below) is invalid when I try to export it. I am new to Shapr3D and can‘t seem to understand why.

The problem are the „pipes“ when I remove them I can export the body perfectly, but with them it is an invalid body.

Thanks! And sorry for maybe my bad english

https://youtu.be/-52tFfqCcQ4?si=HEVAl3BS33rKt46h

What format are you trying to export the body to that makes it invalid? Also, could you be any chance share your design exported in a .shapr format if that works?