How can I degug inside a parfor loop?

When I insert breakpoints inside a parfor loop it is never stopped. In this case how can I debug inside a parfor loop?

[KALYAN ACHARJYA]

Please show your code, have you use break statement within parfor loop with a condition?

Check it out, it may be helpful

https://in.mathworks.com/matlabcentral/answers/4942-break-in-a-parfor-loop-processing-time-example-to-compare-it-with-a-for-loop

[KSSV]

https://in.mathworks.com/matlabcentral/answers/9578-debugging-parfor

Answer 1

[Edric Ellis]

You can debug code called from the body of a parfor loop if no parallel pool is open, but unfortunately you cannot debug the body of a parfor loop itself. You can force the parfor loop to run in the desktop MATLAB by appending the optional "number of workers" argument, like so:

parfor (idx = 1:10, 0)
  out(idx) = myFcn(idx);
end

With that code, you can set breakpoints inside myFcn.

[Farook Sadarudeen]

Thanks for the answer. This helps to Debug.

Answer 2

[NAGAVARSHINI MAYAKKANNAN]

Change the parfor to for debug it and then change for to parfor

Answer 3

[zhehao.nkd]

For those who are seeking for the solution, there is another possible option by using parfor and try-catch:

parfor k = 1: len
    try
        % your code
    catch ME
        % record the iteration index,k
    end
end

% Then youy know which iteration caused a bug alert