Question on Matlab-Maestro integration

Hi all,

My Custom IC design Environment version is Version ICADVM20.1-64b.500.25, and my Matlab version is R2020a.

I am doing a transient simulation for a switching Track and hold switch and measuring its output amplitude through DFT on its transient output, and I swept the input frequency to get the amplitude-frequency plot.

I defined a function in Matlab to collect the amplitude result for each sweep point and interpolate the 3dB bandwidth.

Below is my Matlab script and how I use the function in Maestro.

function result = bw(gain_swo_diff,N)
adeInfo.loadResult();
rdb =adeInfo.adeRDB;
import cadence.Query.*
signal_db = rdb.where(Output()== gain_swo_diff).query().Result;
F3rd =rdb.where(Output()=='F3rd').query().Result;
Fin = F3rd/3;
dc_signal_db = signal_db(1);
signal_db_norm = signal_db - dc_signal_db;
result = interp1(signal_db_norm,Fin,-N, 'makima');
end

The function failed with following error message:

WARNING (ASSEMBLER-4041): Failed to evaluate the MATLAB expression ‘matEval("bw('gain_swo_diff',3)" "bw_3dB_gain_swo_diff" "dc_ac_tran" "maa")’ because of the following error:
MATLAB:undefinedVarOrClass::Unable to resolve the name rdb.where.
Error in <a href="matlab:matlab.internal.language.introspective.errorDocCallback('bw', '/nfs/site/disks/ad_wa_yutaoliu02/serdes/soswa/bw.m', 3)" style="font-weight:bold">bw</a> (<a href="matlab: opentoline('/nfs/site/disks/ad_wa_yutaoliu02/serdes/soswa/bw.m',3,0)">line 3</a>)
signal_db = rdb.where(Output()== gain_swo_diff).query().Result;
Resolve the error and re-evaluate the results.

It seems that there is something wrong with my definition of result database. However, I tested the script  (content in the function) and was able to get the expected result in Matlab.

Could you give me some suggestion how to debug this issue?

Regards,

Yutao