Not Enough input arguments/Unexplained line errors

I dont understand what it means when it says not enough input arguments and I am confused with the errors in solution, arguments and ode45. Is it an error in the function or the solution above. Any help would be much appreciated.

Fao=100;
Fbo = 0;
Fco = 0;
WRange=[0 100];
M0 = [Fao;Fbo;Fco];
[WSol,FSol] = ode45(@Membrane,WRange,M0);

Not enough input arguments.

Error in solution>Membrane (line 28)
Ca = (CTo*Fa)/(Fa + Fb + Fc);

Error in odearguments (line 92)
f0 = ode(t0,y0,args{:}); % ODE15I sets args{1} to yp0.

Error in ode45 (line 107)
odearguments(odeIsFuncHandle,odeTreatAsMFile, solver_name, ode, tspan, y0, options, varargin);

plot(WSol,FSol)

legend("show")
xlabel("Weight (Kg)")
ylabel("F (mol/s)")
legend(["Fa","Fb","Fc"])

title("Problem 5.")

function M = Membrane (Fa, Fb, Fc)
    k = 10;
    kca = 1;
    kcb = 40;
    Kc = 0.01;
    vo = 100;
    Fao = 100;
    Fbo = 0;
    Fco = 0;
    FTo = Fao + Fbo + Fco;
    CTo = Fao/vo;
    Ca = (CTo*Fa)/(Fa + Fb + Fc);
    Cb = (CTo*Fb)/(Fa + Fb + Fc);
    Cc = (CTo*Fc)/(Fa + Fb + Fc);
    ra = -k*(Ca - ((Cb*Cc^2)/Kc));
    rb = k*(Ca - ((Cb*Cc^2)/Kc));
    rc = 2*k*(Ca - ((Cb*Cc^2)/Kc));
    Ra = kca*Ca;
    Rb = kcb*Cb;
    dFadW = ra - Ra;
    dFbdW = rb - Rb;
    dFcdW = rc;
    M = [dFadv,dFbdv,dFcdv];
end

Answer 1

[Walter Roberson]

Fao=100;
Fbo = 0;
Fco = 0;
WRange=[0 100];
M0 = [Fao;Fbo;Fco];
[WSol,FSol] = ode45(@Membrane,WRange,M0);

plot(WSol,FSol)

legend("show")
xlabel("Weight (Kg)")
ylabel("F (mol/s)")
legend(["Fa","Fb","Fc"])

title("Problem 5.")

function M = Membrane (t, Fabc)
    Fa = Fabc(1); Fb = Fabc(2); Fc = Fabc(3);  %all three states in same variable
    k = 10;
    kca = 1;
    kcb = 40;
    Kc = 0.01;
    vo = 100;
    Fao = 100;
    Fbo = 0;
    Fco = 0;
    FTo = Fao + Fbo + Fco;
    CTo = Fao/vo;
    Ca = (CTo*Fa)/(Fa + Fb + Fc);
    Cb = (CTo*Fb)/(Fa + Fb + Fc);
    Cc = (CTo*Fc)/(Fa + Fb + Fc);
    ra = -k*(Ca - ((Cb*Cc^2)/Kc));
    rb = k*(Ca - ((Cb*Cc^2)/Kc));
    rc = 2*k*(Ca - ((Cb*Cc^2)/Kc));
    Ra = kca*Ca;
    Rb = kcb*Cb;
    dFadW = ra - Ra;
    dFbdW = rb - Rb;
    dFcdW = rc;
    M = [dFadW;dFbdW;dFcdW];  %must be column vector, and you were using wrong names
end

[Brianna Biondo]

Thank you so much. I really appreciate the help.