how to place a circular waveguide source in geometry of FEKO

[dhamaka23]

hi all,
I am new to FEKO. i am trying to place a waveguide source at the end of my antenna to provide it power. how to do it ?
the problem coming is each time i place a waveguide, after getting meshed, it shows a rectangular and circular waveguides( both in geometry), out of which the rec. one shows error of not a valid geometry on EM validation and running.
should I use AW card? How to define S3 and a node in this card?
plz help me . its urgent.
Thanks in advance

 

[aiweng]

It may be better by using a feko of higher version, such as 5.5.