One or more output arguments not assigned during call to "sim"

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Vivek Anantharaman
Vivek Anantharaman 2019-11-27
编辑： Vivek Anantharaman 2019-11-27
Hello support team,
I have created a Java Package from the following MATLAB code:
function DTX_Vibration()
prompt = '\n Enter the bearing speed (100-400 RPM) = \n ';
speed = input(prompt);
y = (0.4/300)*speed;
assignin('base','InputTorque',y);
a = sim('DTX','SaveOutput','on','OutputSaveName','shaft'); % shaft is a 'To Workspace' block in Simulink to capture the timeseries data.
a.find('shaft');
output = a.get('shaft');
assignin('base','output1',output);
T = table(output.time,output.Data,'VariableNames',{'Time-sec','Amplitude-mm'});
plot(output.time,output.Data);
title('Vibration signal from the impacted Bearing in Time Domain');
xlabel('Time');
ylabel('Amplitude');
print('vibrations','-djpeg');
filename = 'vibration_shaft.csv';
writetable(T,filename);
end
when the code is executed in Matlab, it is working fine without any error and creates a csv flie containing the timeseries data obtained from the simulink model 'DTX'.
After creating the java package from the library compiler, I executed it through the Windows command prompt as follwos:
javac -cp DTX_Vibration.jar;"C:/Program Files/MATLAB/MATLAB Runtime/v97/toolbox/javabuilder/jar/javabuilder.jar" DTX_VibrationSample1.java
java -cp .;DTX_Vibration.jar;"C:/Program Files/MATLAB/MATLAB Runtime/v97/toolbox/javabuilder/jar/javabuilder.jar" DTX_VibrationSample1
Then I get the follwing error in the command prompt:
... Matlab M-code Stack Trace ...
com.mathworks.toolbox.javabuilder.MWException: One or more output arguments not assigned during call to "sim".
at com.mathworks.toolbox.javabuilder.internal.MWMCR.mclFeval(Native Method)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.access$600(MWMCR.java:33)
at com.mathworks.toolbox.javabuilder.internal.MWMCR$6.mclFeval(MWMCR.java:897)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.mathworks.toolbox.javabuilder.internal.MWMCR$2.invoke(MWMCR.java:784)
at com.sun.proxy.$Proxy0.mclFeval(Unknown Source)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.invoke(MWMCR.java:447)
at DTX_Vibration.Class1.DTX_Vibration(Class1.java:227)
at DTX_VibrationSample1.DTX_VibrationExample(DTX_VibrationSample1.java:29)
at DTX_VibrationSample1.main(DTX_VibrationSample1.java:46)
Please help me on how to use the sim command when assigned as shown in the code.
Thanks for your support.

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