Errors during accessing .dll files using MATLAB

Hello all,

Currently i am planning to run a .dll file from an SDK using my MATLAB App vreated in App Designer, and I am facing a few errors with the same. (error shown below)

I would greatly appreciate if anyone can help me with these issues.

Best,

Sushant

Error loading DLL: Property assignment is not allowed when the object is empty. Use subscripted assignment to create an array element.

Property assignment is not allowed when the object is empty. Use subscripted assignment to create an array element.

Error in App_Sushant_2/startupFcn (line 124)

app.statusText.Text = errorMessage;

The code refreed to in the error message shows assigning a public property as app.dllHandle and has it code as follows:

• methods (Access = public)

% Construct app

function app = App_Sushant_2

app.dllHandle = [];

• try

% Load the DLL and store the handle in dllHandle property

app.dllHandle = loadlibrary(dllPath, headerFile); %'alias', 'Neurostimulator_HID_DLL_2'

app.statusText.Text = 'DLL loaded successfully';

catch ex

% Display error message if DLL loading fails

errorMessage = sprintf('Error loading DLL: %s', ex.message);

disp(errorMessage);

app.statusText.Text = errorMessage;

return;

end

Answer 1

[Ayush Singh]

Hi Sushant

In order to get rid of the error you may try the following :

1. The 'dllPath' and 'headerFile' should be correctly defined in the code in order to use them correctly.
2. This assumes that 'app.statusText' is a valid UI property. If 'app.statusText' does not exist or is not correct type of UI control this line will throw an error.
3. Lastly try changing the line 'app.statusText.Text = errorMessage;' to app.statusText.Text = ex.message' and then try to run the code.

I hope the above information helps!