MATLAB: Subscript indices must either be real positive integers or logicals. FSOLVE PROBLEM

fsolvesubscript indices must either be real positive integers or logicals.

Hi everyone! I get this error message and I thought I might have forgotten a * sign, but apparently it isn't so. What could be wrong?
Main:
% fsolve caller
aaaa=fsolve(@(Z) base_montante(Z,vet_1_base_montante,vet_2_base_montante),-ex_1);
function with vector of equations:
function F = base_montante(Z,vet_1_base_montante,vet_2_base_montante)
vet_3_base_montante=zeros(3,1);
ex_1=[1;
      0;
      0];
vet_3_base_montante(1)=Z(1);
vet_3_base_montante(2)=Z(2);
vet_3_base_montante(3)=Z(3);
F=[dot(vet_3_base_montante,vet_1_base_montante);
   dot(vet_3_base_montante,vet_2_base_montante); 
   dot(vet_3_base_montante,-ex_1)-1];
vet_1_base_montante , ex, and vet_2_base_montante are pre-assigned vectors, so it should solve for the 3 components of vet_3_base_montante…
Here's the complete error message, though only the first line should be the cause for it all:
Subscript indices must either be real positive integers or logicals.
Error in @(Z)base_montante(Z,vet_1_base_montante,vet_2_base_montante)
Error in fsolve (line 219)
            fuser = feval(funfcn{3},x,varargin{:});
Caused by:
    Failure in initial user-supplied objective function evaluation. FSOLVE cannot continue.

Best Answer

Ok, found it. I created a matrix and gave it the same name as this function, so when running the code again without clearing the memory first, Matlab of course didn't accept the function's inputs as valid indices for the matrix...
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