{"id":379879,"date":"2024-08-22T17:48:07","date_gmt":"2024-08-22T17:48:07","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/optslang-error-object-not-known\/"},"modified":"2024-08-22T17:48:07","modified_gmt":"2024-08-22T17:48:07","slug":"optslang-error-object-not-known","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/optslang-error-object-not-known\/","title":{"rendered":"Optslang – ERROR: Object not known"},"content":{"rendered":"

<p>Hi,<\/p><p>I am currently working on optimizing an athermal waveguide in Lumerical FDE (2024R2) using Optislang (2024R1). To facilitate this, I’ve draft a custom script intended to extract several key parameters, such as the figure of merit (FoM), mode numbers, loss, group index (ng), and effective index (neff), which are then used as inputs\/results in Optislang.<\/p><p>Here is the script:<\/p><div class=”dark bg-gray-950 rounded-md border-[0.5px] border-token-border-medium”><div class=”flex items-center relative text-token-text-secondary bg-token-main-surface-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md”><div>#returns a list of results this script produces<\/div><div>function listScriptResults(){<\/div><div>    return {‘neff_slope’: 0, ‘FoM’: 0, ‘mode_no’: 0, ‘loss’: 0, ‘ng_300K’: 0, ‘neff_300K’: 0};  <\/div><div>}<\/div><div> <\/div><div>#returns a list of parameters this script produces<\/div><div>function listScriptParameters(){<\/div><div>    return {‘start_temp’: 300, ‘end_temp’: 400, ‘temp_spacing’: 10};  <\/div><div>}<\/div><div> <\/div><div>#returns results<\/div><div>function computeScriptResults(parameters){  #argument is a struct with fields giving values of different parameters<\/div><div>    # Temperature range and spacing<\/div><div>    start_temp = parameters.start_temp;<\/div><div>    end_temp = parameters.end_temp;<\/div><div>    temp_spacing = parameters.temp_spacing;<\/div><div>    temps = linspace(start_temp, end_temp, (end_temp – start_temp)\/temp_spacing + 1);<\/div><div> <\/div><div>    # Create a matrix to store temperature, effective index, loss, and group index values<\/div><div>    data_matrix = matrix(length(temps), 4);<\/div><div> <\/div><div>    # Loop over the temperature range<\/div><div>    for (i = 1:length(temps)) {<\/div><div>        temp = temps(i);<\/div><div> <\/div><div>        # Set the temperature<\/div><div>        switchtolayout;<\/div><div>        setnamed(“::model”, “temperature”, temp);<\/div><div> <\/div><div>        # Run the FDE simulation<\/div><div>        findmodes;<\/div><div> <\/div><div>        # Get the effective index, loss, and group index of the fundamental mode<\/div><div>        neff = getdata(‘mode1’, “neff”);<\/div><div>        loss = getdata(‘mode1’, “loss”);<\/div><div>        ng = getdata(‘mode1’, “ng”);<\/div><div>        <\/div><div>        # Store the temperature, effective index, loss, and group index in the matrix<\/div><div>        data_matrix(i, 1) = temp;<\/div><div>        data_matrix(i, 2) = neff;<\/div><div>        data_matrix(i, 3) = loss;<\/div><div>        data_matrix(i, 4) = ng;<\/div><div>    }<\/div><div> <\/div><div>    # Extract temperature, effective index, loss, and group index arrays from the matrix<\/div><div>    temps = data_matrix(:, 1);<\/div><div>    neff_values = data_matrix(:, 2);<\/div><div>    neff_300K = data_matrix(1, 2);<\/div><div>    loss_values = data_matrix(:, 3);<\/div><div>    ng_300K = data_matrix(1, 4);<\/div><div> <\/div><div>    # Perform a polynomial fit (linear fit) to the real part of the neff values<\/div><div>    p = polyfit(temps, real(neff_values), 1); # Linear fit<\/div><div> <\/div><div>    # The slope of the linear fit is the second coefficient<\/div><div>    neff_slope = p(2);<\/div><div>    FoM = abs(neff_slope);<\/div><div>    FoM_loss = mean(abs(loss_values));<\/div><div>    mode_no = nummodes;<\/div><div> <\/div><div>    return {‘neff_slope’: neff_slope, ‘FoM’: FoM, ‘mode_no’: mode_no, ‘loss’: FoM_loss, ‘ng_300K’: ng_300K, ‘neff_300K’: neff_300K};<\/div><div>}<\/div><p>I’ve validated the execution of this code in Lumerical FDE, and it returns the correct values as expected. However, when I attempted to integrate this script within a parametric system in Optislang, I encountered an error message: “ERROR: ‘XXXXX’ could not be evaluated: Object ‘script.XXXXX’ not known.”<\/p><p>Could you advise on how I might resolve this issue? It seems that the script may not be recognized correctly by Optislang, and I am unsure how to address this.<\/p><p>Thank you in advance for your assistance!<\/p><p>\"\"<\/p><p>\"\"<\/p><p>\"\"<\/p><p>\"\"<\/p><\/div><\/div><\/p>\n","protected":false},"template":"","class_list":["post-379879","topic","type-topic","status-publish","hentry","topic-tag-LumericalMode-1","topic-tag-optislang"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t