Java Exception error using Ocean Optics Spectrometer

Hello,

I am not very familiar with programming in general, but I have been getting issues when an error occurs in my program. Currently, my program detects my attached spectrometer, is capable of reading the data & writing to an output (meaning the OmniDriver and appropriate toolbox have been installed correctly).

import('com.oceanoptics.omnidriver.api.wrapper.Wrapper');
wrapper = Wrapper();
NoOfDevices = wrapper.openAllSpectrometers();
Name = wrapper.getName(0)


%% Some settings for device 
wrapper.setIntegrationTime(0,800000); %1000 = 1ms
wrapper.setScansToAverage(0,3);
wrapper.setBoxcarWidth(0,2);
wrapper.setCorrectForDetectorNonlinearity(0,1);
wrapper.setCorrectForElectricalDark(0,1);

%% Get a spectrum from device 0 and plot it

%%Collect i amount of spectra
for i = 1:5
time_start = datestr(now,'dd-mm-yyyy HH:MM:SS.FFF');
time_end = datestr(now,'dd-mm-yyyy HH:MM:SS.FFF');
display(time_start);
wvl = wrapper.getWavelengths(0);
spectrum = wrapper.getSpectrum(0);
figure
plot(wvl,spectrum)
title('Optical Spectrum');
ylabel('Intensity (counts)');
xlabel('\lambda (nm)');
grid on
axis tight
display(time_end);
SpectraData =[wvl, spectrum];
SpectraFileName = sprintf('Spectra %i', i);
writematrix(SpectraData,fullfile(SpectraPath,SpectraFileName),'FileType', 'spreadsheet');

end

%% Clean up
wrapper.closeAllSpectrometers();

However, when I attempt to run my code, and an error occurs, the next attempt at running my code gives the following Java errors:

Error using MyMatlabCode
Java exception occurred:
java.lang.ArrayIndexOutOfBoundsException: 0

	at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:388)

	at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:397)

	at com.oceanoptics.omnidriver.api.wrapper.Wrapper.getName(Wrapper.java:508)

I am unable to run the code again unless I exit and reopen MATLAB. Doing this, the code runs fine until I run it with another error, leading to the same Java errors.

Within Ocean Optics OmniDriver programming manual, if an I/O error occurs, you can call the function wrapper.getLastException(), which returns: java.lang.NullPointerException.

I'm not sure how to proceed from here, but I would like to be able to run my program again if errors occur. I think the problem occurs because the closeAllSpectrometers() fails to execute when there is an error, but calling the function in the beginning of the code does not fix this error.