Base on CST website,they claim that CST PCB Studio can import Altium files,

https://www.cst.com/Products/CSTPCBS/ImpExp

But when I open Import on CST , it gives me just these options : 

![CST PCB Studio Import][1]


  [1]: https://i.sstatic.net/8ci1A.jpg

I tried to Export Altium to HyperLynx and Import it to CST PCB Studio,but it gave error too.
I also tried converting to AutoCAD and use ODB++ , but still gives error for importing.

Do you have any solution ?

Thanks.