Why do I receive an error message about output arguments for my Embedded MATLAB Function in Simulink?

I have if-else statements in my code to output different results in different situations. When I start the simulation I get the following error message.. I hope you can help me. Thank you

Output argument 'D' is not assigned on some execution paths.

Function 'MPPT /IC Algo' (#182.9.10), line 1, column 10: "D"

function D = InCon(V,I,T)

[Honglei Chen]

The error message suggests that your D is not assigned for certain input combination. without the code itself, it would be hard for people to provide useful suggestions.

[manash mishra]

ok, I am attaching the coding file. Thank you

Answer 1

[Birdman]

Simulink wants to know the initial value and size of your output at the very beginning of the simulation. Therefore, add

 D=0;

statement to your function at the very beginning. Then, it should work without error.

[manash mishra]

Thank you for your answer, it works properly.But the values of Dis zero always.

[Birdman]

Then check your if-else statements and make sure that they are being entered because your value should have changed.

[manash mishra]

I can't get your answer

Answer 2

[Honglei Chen]

Your D is undefined for the cases where T<=n*0.005

You can consider add that by adding the else branch to the code, for example,

if T>n*0.005
  ...  % what you have now
else
  D = Dold;
end

HTH

[manash mishra]

Thank you for your answer,but it doesn't work properly. same error

[Shreyas H R]

i am facing the same error, if you have got any solution related to this, please do share me. [e-mail]