Help me with dipole antenna design in ADS

Hi friends i am designing a dipole antenna..the following are the threads i found while simulating dipole...
using minimal snap distance of 0.0004 mm
(¤ layout resolution points) for layout healing.
Generating mesh at 3 Ghz
Port 1...mesher chose to use an analytical (approximating) formula
to estimate the wavelength it needs to determine the maximum cellsize.
Mesh generation finished
S-parameter simulation
Warning:the 2d port solver data is not available.
Using default values (50 ohms) for the transmission line parametrs.
Automatic selection: direct dense matrix solver
using multi threaing (2 threads)

How to overcome this and i am not able to plot S21 and S12...

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