[SOLVED] Error during optimization with LSSP controller "Independent variable does not exist for RangeVar"

[Nathan1]

I am getting this error when I am trying to optimize in ADS with LSSP Simulation controller "Independent variable does not exist for RangeVar". Using the "freq" variable as well as creating an independent variable didn't fix the problem. Using a small signal SP controller as the final analysis fixes the problem, but I want to optimize with LSSP. Thanks in advance for your help.

 

[Nathan1]

I am getting this error when I am trying to optimize in ADS with LSSP Simulation controller "Independent variable does not exist for RangeVar". Using the "freq" variable as well as creating an independent variable didn't fix the problem. Using a small signal SP controller as the final analysis fixes the problem, but I want to optimize with LSSP. Thanks in advance for your help.

@BigBoss @FvM

 

[volker@muehlhaus]

creating an independent variable didn't fix the problem

Do you understand the meaning of "independent variable"? This is the variable/value that you sweep. For SP analysis that is "freq".

But if you look at the ADS LSSP example, they use "LSSP_freq" as the sweep variable (idependent variable), and this variable name is what you need to specify in the optimization goals to limit the goal to a certain range.

In your screenshot, you have used "freq" and it seems that your LSSP frequency variable has a different name in your testbench.

But f

 

[Nathan1]

Do you understand the meaning of "independent variable"? This is the variable/value that you sweep. For SP analysis that is "freq".

But if you look at the ADS LSSP example, they use "LSSP_freq" as the sweep variable (idependent variable), and this variable name is what you need to specify in the optimization goals to limit the goal to a certain range.

In your screenshot, you have used "freq" and it seems that your LSSP frequency variable has a different name in your testbench.

View attachment 183746
But f

Thanks a lot, volker@muehlhaus. In fact, I followed the same method as you suggested and repeated your steps, but I am still getting the same error. The problem is not with LSSP simulation, but when I select LSSP simulation controller as final analysis in optimization, I get the mentioned error. I will really appreciate if you could try optimization with LSSP simulation controller as the final analysis. Thank you once again. Waiting for your response.

 

[volker@muehlhaus]

Sorry, I have no time to replicate your setup. Check your variables in output (data display), if the variable that you selected in optimization for range actually exists in output data.

 

[Nathan1]

Sorry, I have no time to replicate your setup. Check your variables in output (data display), if the variable that you selected in optimization for range actually exists in output data.

Thanks a lot. I can see the variable in the data display but still the same error.

 

[BigBoss]

I have tried this set-up for a nonsense circuit and it seems working.

 

[Nathan1]

I have tried this set-up for a nonsense circuit and it seems working.
View attachment 183756
View attachment 183757

Thanks a lot for your help, I really appreciate it. The optimization is now running according to the steps you mentioned. I haven't been able to fix it for a couple of days .