fmincon exitflag=0; MaxIter=3000; output.iterations=277

fmincon gives me command window warnings that MaxIter is exceeded and returns the correct exitflag. But the returned iteration count is well below MaxIter.

Running MatLab R2014a.

Any idea what is going on?

Rob B.

Answer 1

[Alan Weiss]

I am not sure what is going on here. Can you show us your options, and the way you called fmincon? I am also interested in seeing ALL of the fmincon output.

Alan Weiss

MATLAB mathematical toolbox documentation

Answer 2

[Robert]

Here is the command window. The calling function is attached.

>> Run_NSx Input data for 14-Jun-1961 has been processed

Solver stopped prematurely.

fmincon stopped because it exceeded the function evaluation limit, options.MaxFunEvals = 3000 (the default value).

>> output

output =

         iterations: 291
          funcCount: 3004
    constrviolation: 0
           stepsize: 3.0823e-08
          algorithm: 'interior-point'
      firstorderopt: 0.0113
       cgiterations: 690
            message: 'Solver stopped prematurely.

fmincon stopped because it exceeded the function evaluation limit, options....'

[Alan Weiss]

There are only 291 iterations, well below the limit, that is true. But the solver stopped because the number of function evaluations, 3004, exceeded the function evaluation limit MaxFunEvals.

Alan Weiss

MATLAB mathematical toolbox documentation