SI simluations issues in Altium 18

[TonyPhilip]

Hi,
I am a newbie to Altium 18 . I am trying to use the SI Analysis and to find out reflection and cross talk issues within a simple board. The Lines I am looking at is the SDA and SCL Lines on the board  . I have imported the IBIS models for the system too. I get some data in the analysis , but then I am moving to plot the graphs with various terminations . It gives me a error box and does not show me any graphs.

I pressume this an issues with the settings because I am able to get simulations graphs for one of the traces.

Can someone help me out with this basic simulation?