MATLAB: Cannot enable breakpoint(s) because of syntax error. a break may only be used within a for or while loop

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Trying to place a breakpoint to debug my function leads to an error:

cannot enable breakpoint(s) because of syntax error.

a break may only be used within a for or while loop, and then only within the same file as its corresponding for or while statement.

Best Answer

This is due to a change in MATLAB software.

The "break" function can no longer be used outside for or while loops or inside for or while loops in a different file.

Changing the function "break" to the function "return" resolves this issue.

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MATLAB: How to degug inside a parfor loop

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.

MATLAB: Disable cannot enable breakpoint(s) message

You did used to be able to breakpoint a file that had syntax errors. But after they implemented this warning, I don't remember being able to ignore it.

I looked around the Preferences and did not see a way to do this.

Best Answer

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MATLAB: How to degug inside a parfor loop

MATLAB: Disable cannot enable breakpoint(s) message

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