matlab function block in Simulink

Hello,

I dont understand whats going on in my matlab function block.

I have the following Code

function y = Lenkwinkelbegrenzung3(Fx_V, Fy_V, Mz_V, F_max_1, F_max_2, F_max_3, F_max_4, f1,f2,F_Fehler_1,F_Fehler_2, f3, f4, F_Fehler_3, F_Fehler_4,  l_h, l_v, w_vl, w_hl, w_hr, w_vr)

        E = [1,0,1,0,1,0,1,0; 
            0,1,0,1,0,1,0,1;
            -w_vl,l_v,w_vr,l_v,-w_hl,-l_h,w_hr,-l_h;
            1,0,0,0,0,0,0,0];

        
F_soll = [Fx_V; Fy_V; Mz_V; 0];

%Definition des Rechtsannihilators G_ra
E_Ra = null(E);

%Definition der Moore-Penrose Inverse G_plus
E_Moore = transpose(E)/(E*transpose(E));


%Definition der Gewichtungsmatrix Q
Q = [1/F_max_1 0 0 0 0 0 0 0;
    0 1/F_max_1 0 0 0 0 0 0;
    0 0 1/F_max_2 0 0 0 0 0;
    0 0 0 1/F_max_2 0 0 0 0;
    0 0 0 0 1/F_max_3 0 0 0;
    0 0 0 0 0 1/F_max_3 0 0;
    0 0 0 0 0 0 1/F_max_4 0;
    0 0 0 0 0 0 0 1/F_max_4];

delta_U = -inv(transpose(E_Ra)*Q*E_Ra)*transpose(E_Ra)*Q*E_Moore*F_soll;

y= E_Moore*F_soll+E_Ra*delta_U;

An in my matlab skript I get a reasonable output with y(1) = 0,

but as soon as I implement it in a matlab function block in simulink my y(1) doesnt equal zero anymore.

Can anyone explain to me why?

I dont understand why this is happening and what can I do about it

Thanks for reading