Fmincon error not enough input arguments

function Variancee = VarObjective(VCVMatx, WStarSave);
    Variancee = WStarSave * VCVMatx * WStarSave';

[x, fval] = fmincon('VarObjective', WStarSave', swtOther_A, swtOther_b, AeqMatx, BeqMatx, swtMinWt', swtMaxWt')
%where
WStarSave = 1 X 10 matrix of weights
swtOther_A = [ 0 0 0 0 -1 0 0 -1 0 -1 ; 0 0 0 0 1 0 0 1 0 1]; 
swtOther_b   = [ -0.06 ; +0.40 ];
    AeqMatx(1, :) = swtOther_Aeq; where this equals [ 1 1 1 1 1 1 1 1 1 1 ];
    AeqMatx(2, :) = returnMatx(1, :);
    AeqMatx(3, :) = [1 0 1 0 0 0 1 0 0 0];
    
    
    BeqMatx(1, :) = swtOther_beq; where this equals [ 1.00 ];
    BeqMatx(2, :) = ERGrid(i, 1); where this i will change into the loop
    BeqMatx(3, :) = [.22]; 

THE ERROR WE GET IS THE FOLLOWING:

Not enough input arguments.
Error in VarObjective (line 3)
Variancee = WStarSave * VCVMatx * WStarSave';
Error in fmincon (line 552)
initVals.f = feval(funfcn{3},X,varargin{:});
Error in FEHW7 (line 205)
[x, fval] = fmincon('VarObjective', WStarSave', swtOther_A, swtOther_b, AeqMatx, BeqMatx, swtMinWt', swtMaxWt');%lb -s -inf and ub is +inf
Caused by:
Failure in initial objective function evaluation. FMINCON cannot continue.

Answer 1

[Stephan]

Your objective function takes 2 input arguments - by default the optimization solvers only use 1 argument, which is the vector of variables to find optimal values for. For passing extra parameters to your óbjective function via the optimization solver have a read here:

https://de.mathworks.com/help/optim/ug/passing-extra-parameters.html

for example if your optimization variables are stored in VCVMatx use:

[x, fval] = fmincon(@(VCVMatx)VarObjective(VCVMatx, WStarSave), ...)