Spectre and Simulink cosimulation - Problem on using cds_srr and defining a resistor as the input

Dear All,

     I've just been able to run a successful co-simulation with SpectreRF Engine and MATLAB/SIMULINK.

Now, I want to define the amount of a resistor in my low-level circuit (I guess it is considered a "variable" in ADE like what we do for a parametric analysis) as "cosimulation input" in "cosimulation option" configuration page. My intimate goal is to find the proper value of the resistor to minimize an output voltage of the circuit using a MATLAB Optimization Toolbox.

It seems that only sources of the circuit could be defined as cosimulation input. Is there any other possibilities?

Moreover, could be some benefits with the command cds_srr in this problem? I try to use the command generally but I have this problem:

I try below:

Verify the dynamic library path by checking the LD_LIBRARY_PATH environment variable. Make sure that both <instdir>/tools/dfII/lib and <instdir>/tools/lib are in the path. For C shell users, use the following command
setenv LD_LIBRARY_PATH `cds_root spectre`/tools/dfII/lib:`cds_root spectre`/tools/lib:${LD_LIBRARY_PATH}

Solaris users also need to add the toolbox installation path to LD_LIBRARY_PATH. For C shell users, use the following command
setenv LD_LIBRARY_PATH `cds_root spectre`/tools/spectre/matlab:${LD_LIBRARY_PATH}

But in MATLAB:

help cds_srr

cds_srr not found.

I checked the root /tools/dfII/lib. But there is no bin folder in dfll. This is the cause of the problem? If yes, what should I do now?

Best Regards,

Milad