coaxial feeding for a bowtie antenna

i am following this paper.

in this since there is no substrate is used i assumed the thickness of the antenna to be like a plane. now i want to feed using coax then the bottom surface is connected to ground snd the upper triangular shape has been connected to the feed. on doing this i am getting the error - needs terminal between 1 and 25.

also is it possible to bend the structure in hfss. i have used a simple triangular sheet instead of using the bend structure.

regarding the feed :
- i made a hole of rad = 1mm on the ground , made the inner conductor of the coax to be 1mm. and connected this to the tip of the triangles.
- substrate rad = 2mm (did subsrate - inner conductor with cloning)
- outer conductor rad = 2.5mm (did outer conductor - substrate with cloning) connected to ground.

Attach your design file...will check for you.

uploaded the design. not made a bend geometry

ok I was able to solve that error but th e actual paper has a geometry that is bend (curved surface) . So is there a way by which it is possible to this in hfss? I am not able to find any option in hfss