Why do I get this error 'Error using size Dimension argument must be a positive integer scalar within indexing range. Error in var (line 109) n = size(x,dim);'

Hello, I am using Daynare with matlab (student use). I want to test this code, but I get this error. Can anybody help me?

var c k n z;
varexo e;
parameters beta chi delta alpha rho ;
%----------------------------------------------------------------

alpha   = 0.33;
beta    = 0.99;
delta   = 0.023;
chi     = 1.75;
rho     = 0.95;  

%----------------------------------------------------------------

model; 
  (1/c) = beta*(1/c(+1))*(1+alpha*(k^(alpha-1))*exp(z(+1))*(n(+1))^(1-alpha)-delta);
  chi*c/(1-n) = (1-alpha)*(k(-1)^alpha)*exp(z)*(n^(-alpha));
  c+ k-(1-delta)*k(-1) = (k(-1)^alpha)*exp(z)*n^(1-alpha);
  z = rho*z(-1)+e;
end;

%----------------------------------------------------------------

initval;
  k = 9;
  c = 0.76;
  n = 0.3;
  z = 0; 
  e = 0;
end;
steady;
check;

%---------------------------------------------

%Temp shock

%shocks;
%var e ; periods 1:10;
%values 0.01;
%end;

%Perm shock

endval;
  k = 9;
  c = 0.76;
  n = 0.3;
  z = 0; 
  e = 0.01;
end;
steady;

shocks;
var e ; periods 1:9;
values 0;
end;

%-----------------------------------------

simul(periods=200);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

tt=1:202';

subplot(2,2,1);
plot(tt,oo_.endo_simul(1,:),tt,oo_.steady_state(1)*ones(1,202),'LineWidth',2);
title('C')

subplot(2,2,2);
plot(tt,oo_.endo_simul(2,:),tt,oo_.steady_state(2)*ones(1,202),'LineWidth',2);

title('K')

subplot(2,2,3);
plot(tt,oo_.endo_simul(3,:),tt,oo_.steady_state(3)*ones(1,202),'LineWidth',2);
title('N');

subplot(2,2,4);
plot(tt,oo_.endo_simul(4,:),'LineWidth',2);
title('z')