Error using symengine DOUBLE cannot convert the input expression into a double array.

I call function in my main script as

[vn]=noise_example_plot(tfv);

Now without using Vn value it starts giving me error. If i comment out this function call from my script then all runs ok. But as i call it , it gives following error

Error using symengine
DOUBLE cannot convert the input expression into a double array.

Error in sym/double (line 613)
        Xstr = mupadmex('symobj::double', S.s, 0);

Error in Model_AnalogSection_ASD_ (line 137)
da3td = double(y2t);

zci = @(v) find(v(:).*circshift(v(:), [1 0]) <= 0);                    % Returns Approximate Zero-Crossing Indices Of Argument Vector
da3td = double(y2t);%Line 17
idx = zci(da3td);
if da3td(1) * da3td(end) < 0
    idx = idx(2:end);
end
for k = 1:numel(idx)
    t_exact(k) = interp1(da3td(idx(k))+[-1 +1]*1E-5, time(idx(k))*1E9+[-1 +1], 0);
    
end
hold on;

[darova]

Can you show something more?

[Star Strider]

The error that line throws is likely due to a symbolic variable being in ‘y2d’. Without seeing ‘y2d’ it is not possible to offer a solution (if one exists).