Hii.I am new to matlab environment. I am unable o find out why I am getting error as" not enough input arguments".

MY code is

xo=0.4;
A=[];
b=[];
Aeq=[];
beq=[];
 Q=100;
 R=1;
N = 50;
U0= zeros(100,1);
% Umin= -1*ones(100,1);
% Umax=1*ones(100,1);
% U = fmincon(@cost1,U0,A,b,Aeq,beq,Umin,Umax,[],[],N);
x=xo; h = 0.1;
xo=[-0.5,0.5];
options = optimoptions(@fmincon,'Algorithm','sqp');
U = fmincon(@cost1,U0,[],[],[],[],[],[],@confuneq,options);
for k =1:N
    S1= F(x(k),U(k));
    S2=F(x(k)+0.5*h*S1,U(k));
    S3=F(x(k)+0.5*h*S2,U(k));
    S4=F(x(k)+h*S3,U(k));
    x(k+1) = x(k) + (1/6)* (S1+ 2*S2+ 2*S3 + S4)*h;
    k = k + 1 ;   
end

% plot(x);
 plot(U);
 grid on
 figure(); plot(x)
grid on

[KSSV]

YOu have not specified the line number of error..and also the function cost1 is missing.