TMUX1574: How to control the SEL pin in the IBIS model

Thanks. I found out it wasn't a model problem. The problem is that only the switch inputs and output were showing up on the selected line in Hyperlynx. So pin15 was not present (the SEL line). However, I found out that I could select MULTIPLE lines in Hyperlynx, both the switch inputs and output AND the SEL line. Hopefully I can make Hyperlynx set the SEL line as I want to control which input drives the output.
I would suspect you would have the same problem in ADS and whatever worked there might help me. But I think I can get it working now that I found I can select multiple lines.

Nir,
   I finally got everything connected and it does seem like a model problem. I was able to select pin 15 (the RSVR SEL pin) in my simulation. However, it doesn't seem to matter if I drive it high or low (3.3V with a 3.3V supply), in both cases the TMUX1574 model always selects input 1, not input 2. I can tell this because the waveforms at inputs 1 & 2 are different and the output always matches the input 1 signal. It still could be a simulator problem, but I don't see how. 
I will likely have to manually edit the TMUX1574 .ibs file to force the switch_3.3 inputs to flip.

I found a way around this problem. I switched the order of the lines folling the  [Series Switch Groups]  section.
If I edit the model to have On 1/ first then input 1 is connected to the output.

[Series Switch Groups]
On 1 /
On 2 /
Off 1 2 /

If I edit the model to have On 2/ first then input 2 is connected to the output.

[Series Switch Groups]
On 2 /
On 1 /
Off 1 2 /

Maybe ADS allows control over this, but Hyperlynx doesn't. And as I said, driving the SEL pin high and low doesn't make the input switch.

It is a bit tedious, but I will just have to apply two different models, depending on which input I want to have selected.