Analog value fetch functions : issue with incisiv 15.20.004

$cgav is a Cadence-defined function for integrating Incisive with Spectre AMS. I don't see any reference to $caiv in the docs, so perhaps you made a typo?

Anyway, the error message is telling you that the simulator cannot find a shared library function that implements the $caiv PLI/VPI call.

Hi Steve,

Thanks for the reply. I am using $cds_analog_is_valid (short form caiv) first to check signal is a analog signal and then $cds_get_analog_value (short form cgav). When i use these functions I get the error message.
Even when I use verbose form of these functions, I get errors

ncsim: *E, MSSYSTF ..... User Defined system task or function ($cds_analog_is_valid) registered during elaboration and used within the simulation has not been registered during simulation

ncsim: *E, MSSYSTF ..... User Defined system task or function ($cds_get_analog_value) registered during elaboration and used within the simulation has not been registered during simulation

I am not sure why these functions calls are not working

Let me know path to this VPI routine so that i can load it using -loadvpi *

BR

These functions only get loaded with the analog solver. So if you don't have any electrical or Spice models, then only the discrete engine is used and those functions are not available.

Using a function to change the functionality of $cgav is the most flexible way to switch between discrete and electrical versions.

function automatic real cgav(string path, string qualifier="potential");
  `ifdef WREAL cgav=0;
  `else        cgav=$cgav(path, qualifier);
  `endif
endfunction

Tim

Hi Tim,

Thanks for your input.

Analog solver was not being called in my sims.

The issue is fixed at my end

BR