Import A HFSS file into CST

I want to import an HFSS file into cst but it keeps requesting a .sm3 file and all I have is a .hfss file . Please help it's urgent :S

you could always just use HFSS ;) However, If you want to get the *.sm3 file, you will have to open the HFSS file and go to HFSS -> Export and export the geometry in the *.sm3 format (or equally the *.sat format as both CST and HFSS share an ACIS kernel)

Have Fun