repeat the iteration with an error using try/catch

I wrote a nested for loop to exexcute a huge number of iterations. However, sometimes an error stops the program. I want to repeat the iEv'th iteration in case an error occurs and then continue to next iteration. Please see below the code and let me know if it should be modified.

for iTcm=1:nTcm  
    for iScen=1:nScen
        for iEv=1:nEv
            try
              MyProgramHere
            catch ME
                disp(ME);
                fprintf('Retrying the program...\n');
            end
        end
    end
end

Answer 1

[James Tursa]

Maybe this construct does what you want

            while( true )
                try
                  MyProgramHere
                  break
                catch ME
                    disp(ME);
                    fprintf('Retrying the program...\n');
                end
            end

[Mos_bad]

James if you mean the following code, yes it works. I added iEv = iEv - 1 after cath ME.

My concern is if an error occurs within the iEv'th iteration, is the iEv'th iteration repeated? or the program skips the iEvth iteration where the error occurs and goes to next iteration (iEv+1)?

for iTcm=1:nTcm  
    for iScen=1:nScen
         for iEv=1:nEv
            while  (true)
                try
                   MyProgram
                   break
                catch ME
                    iEv = iEv - 1;
                    disp(ME);
                    fprintf('Retrying the program...\n');
                end
            end
         end
    end
end

[Mos_bad]

This code didn't work either. Any help?

[James Tursa]

No. I meant exactly what I wrote, without this line:

iEv = iEv - 1; % delete this line

By getting rid of this line, it will keep repeating the same iteration indefinitely until it passes. iEv doesn't change until you do the iteration successfully. If you want a limit on the number of tries before you generate an error then additional code would need to be added.

Answer 2

[darova]

My proposition

for iTcm=1:nTcm  
    for iScen=1:nScen
        iEv = 0;
        while  iEv <= nEv
            iEv = iEv + 1;
            try
              MyProgramHere
            catch ME
                iEv = iEv-1;
                disp(ME);
                fprintf('Retrying the program...\n');
            end
        end
    end
end

[Mos_bad]

The suggested code does not work.

[darova]

How is it possible? Can you be more specific?

[darova]

What about this. I improved my code

[Mos_bad]

With the improved code, when the iEv count reaches to nEv, the program control goes immediately to the catch block. So the program stops without going to (iScen+1)th iteration.