Failure in initial user-supplied nonlinear constraint function evaluation

Hi,

Basically, objective value is determined by Ansys analyses and the constraint function is dependent to a special sum

of x values. But, the initial value of constraint function can not be calculated. Can anyone point me about the problem? I attached the matlab file

and error message below.

Thank you

Error using ga (line 393)

Not enough input arguments.

Error in run_script (line 27)

[x,fval,output,population,exitflag] = ga(ObjectiveFunction,nvars,...

Caused by:

Failure in initial user-supplied nonlinear constraint function evaluation.

Answer 1

[Matt J]

One problem:

nonlcon = @simple_constraint;

There is no function called 'simple_constraint' in your attached script. There is a function called 'simple_const' which is never used.

[ugur simsek]

Thank you Matt, I fixed it, but unfortunately I get same error. Probably, I forgot it when I was debugging.

[Matt J]

Well, the error message says you are not giving simple_constraint (whatever it is) enough input arguments so you should check to see what inputs it expects.

[ugur simsek]

It needs only integer variables as input assigned by the GA.Then this simple constraint function converts them a value. I could not understand why constraint function can not take the variables.

[Matt J]

ga() will try to pass a single vector argument to your constraint function (and nothing else). Your constraint function needs to be prepared for that