Matlab coding for a PBR with pressure drop and adiabatic operation problems

[anthony0028]

I am having issues getting this code to run. I actually received this code back in college when taking reactor design, now it will not run. I am receiving several errors which I have failed to resolve. what is wrong with the coding?

here are the errors when I run the ODE45 script:

>> exampleGas_graphs
Error using odearguments (line 90)
EXAMPLEGASPD_X_2013 must return a column vector.

Error in ode45 (line 113)
[neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, odeFcn, ...

Error in exampleGas_graphs (line 1)
[w,y]=ode45('ExampleGasPD_X_2013',[0 70],[1 0]);


The function file is as follows:
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function dy=ExampleGasPD_X_2013(w,y);
dy=zeros(1,0);
alpha=0.01;
vo=10;
Fao=2; Fbo=5; Fto=Fao+Fbo;
T1=(73000*y(2)+53550);
T2=105+30*y(2);
T=(73000*y(2)+53550)/(105+(30*y(2)));
x=y(2);
Cto=Fto/vo;
ko=0.001; Ea=10000; R1=1.987;
To=300;
kprime=ko*exp((Ea/R1)*((1/To)-(1/T)));
Ca=Cto*(1-y(2))*y(1)/(3.5-y(2))*To/T;
Cb=Cto*(2.5-2*y(2))*y(1)/(3.5-y(2))*To/T;
Cc=Cto*(2*y(2))*y(1)/(3.5-y(2))*To/T;
rate=kprime*(Ca*Cb*Cb);
dy(1)=-(alpha*(3.5-y(2))/2/y(1))*To/T;
dy(2)=rate/Fao;
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The ODE45 file is as follows:
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[w,y]=ode45('ExampleGasPD_X_2013',[0 70],[1 0]);
figure; plot(w,y,1));
xlabel('w');
ylabel('P/Po');
figure; plot(w,y,2));
xlabel('W');
ylabel('X');

T=T1/T2;
figure; plot(y,2),T);
xlabel('w');
ylabel('T');
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