How can I degug inside a parfor loop?

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

Edric Ellis
Edric Ellis on 30 Oct 2017
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.
  1 Comment
Farook Sadarudeen
Farook Sadarudeen on 1 Nov 2017
Thanks for the answer. This helps to Debug.

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More Answers (2)

NAGAVARSHINI MAYAKKANNAN
NAGAVARSHINI MAYAKKANNAN on 21 Jun 2020
Change the parfor to for debug it and then change for to parfor

zhehao.nkd
zhehao.nkd on 5 Aug 2022
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

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