Hello! I am trying to retrieve data about wavefront via ZOS-API in Matlab. Since I need to iterate through different positions of mirror, I am using coordinate breaks and iterate through them using arrays and FOR cycle:

decenter = [-0.5:0.1:0.5];
tilt = [-0.2:0.04:0.2];
for i = 1:tilt_length
    for j = 1:decenter_length
    disp([i j]);
    TheSystem.LDE.GetSurfaceAt(3).GetCellAt(13).DoubleValue = decenter(j); % I set decenter here in the coordinate break (surface 3)
    TheSystem.LDE.GetSurfaceAt(3).GetCellAt(14).DoubleValue = tilt(i); % I set tilt here
    newWin = TheSystem.Analyses.New_WavefrontMap(); % Requesting new window
    newWin_Settings = newWin.GetSettings(); % Requesting settings
    newWin_Settings.Wavelength.SetWavelengthNumber(1); % Setting wavelength number
    newWin_Settings.Field.SetFieldNumber(1); % Setting field number
    newWin_Settings.Sampling = ZOSAPI.Analysis.SampleSizes.S_1024x1024; % Setting sampling
    newWin.ApplyAndWaitForCompletion(); % Applying the settings
    newWin_Results = newWin.GetResults(); % 
    wavefrontmap = newWin_Results.DataGrids(1).Values.double; % Exporting the wavefront map with decenter and tilt
    end
end

It iterates for some time, but then gets an error:

Dot indexing is not supported for variables of this type.

Error occurs when the code tries to set wavelength number. It reproduces every time (for this specific arrays of decenter and tilt it happens when (i,j) = (9, 11).). However, it executes smoothly if I use these values directly. While debugging, I found out, that newWin_Settings = newWin.GetSettings() for some reason returns empty array, so I can’t address any settings at all. Is there any way to avoid the error? Thank you.