Matlab App Erroneously detecting infinite loop

Hello Gurus,

I have a matlab application that acts as a wrapper to Simulink Test. Some of the Tests can take a very long time to run, I'm talking several hours. When I run one of these tests that involves many iterations the application closes down during the activity. As the data for simulink test is actually loaded on to the Tree I use to display the tests this means that the next Test fails. The weird thing is I can run hundreds of single iteration tests without issue and the issue does not have anything to do with a license I think as I selected to borrow a license for the whole day just in case. The app gives me no errors or warnings it just closes itself down on the long running iterations. Any ideas/ tips appreciated.

Cheers

Richard

[Richard Good]

I get this message in the window when the issue happens,

Error while evaluating DestroyedObject PrivatePushedButtonFcn

This is supposed to indicate an infinite loop I think, but I do not have an infinite loop, it just takes a long time sometimes. I have a for loop with 5 further for loops inside it to iterate over my simulink tests the way I want. I think Matlab has erroneously detected an infinite loop. How do I get over this/ switch off that check?

Answer 1

[Eric Delgado]

It sounds like a limitation of the foor loops. For example, if you create e for loop from 1 to a BigNumberAlmostInfinite you will receive the warning "Too many FOR loop iterations. Stopping after 9223372036854775806 iterations."

Just replace it for while loops.

% Instead of:
for ii = 1:BigNumberAlmostInfinite
    % code    
end

% Do:
ii = 0;
while true
    ii = ii+1;
    % code
    
    if ii == BigNumberAlmostInfinite
        break
    end    
end

[Richard Good]

Hi Eric,

Thanks for your reply, but I don't have an outrageous number of iterations, it's more the time it takes to run a few hundred, I believe something is timing ut and causing my application to close down, hunting around the warnings led me to believe it might be something to do with erroneous infinite loop detection.

[Eric Delgado]

Even though you said that the app shows no error or warning messages, did you try to protect your code with a try/catch block?

for ii = 1:BigNumberAlmostInfinite
    try
        % code
    catch ME
        % put a break point in here and share the info of ME
    end    
end