Using hinfsyn for robust control design

Hello

I have a problem with the hinfsyn fucntion. First the code for hin_rock.m:

% H_infinity design for the rocket stabilization system
%
 sys_rock
nmeas = 2;
ncon = 1;
gmin = 0.15;
gmax = 1000000;
hin_ic = sel(sys_ic,8:11,8:11);
tol = 0.001;
[K_hin,clp] = hinfsyn(hin_ic,nmeas,ncon,gmin,gmax,tol)
disp(' ')
minfo(K_hin)
disp(' ')
disp('Closed-loop poles')
sp = spoles(clp)
omega = logspace(-3,2,500);
clp_g = frsp(clp,omega);
figure(1)
vplot('liv,lm',sel(vsvd(clp_g),1,1),'m-'), grid
title('Singular Value Plot of clp')
xlabel('Frequency (rad/sec)')
ylabel('Magnitude')
K = K_hin;

and sys_rock

% Generates the open-loop connection for the
% rocket stabilization system 
%
% rocket model
mod_rock
% sensor models
wsa_rock
% weighting functions
wts_rock    
%
systemnames = ' G_rock Wa Wan Wg Wgn Wm Wp Wu ';
inputvar = '[ pert{7}; ref; noise{2}; control ]';
outputvar = '[ G_rock(1:7); Wp; Wu; 0.4*ref - Wa - Wan; -Wg - Wgn ]';
input_to_G_rock = '[ pert; control ]';
input_to_Wa = '[ G_rock(10) ]';
input_to_Wan = '[ noise(1) ]';
input_to_Wg = '[ G_rock(9) ]';
input_to_Wgn = '[ noise(2) ]';
input_to_Wm = '[ ref ]';
input_to_Wp = '[ G_rock(10) - Wm ]';
input_to_Wu = '[ control ]';
sysoutname = 'sys_ic';
cleanupsysic = 'yes';
sysic;

In fact clp is empty and K_hin is empty too, which is something I dont get. Also: hin_ic = sel(sys_ic,8:11,8:11); is required to be in the code,so there must be a way.

Regards

[Özgür]

Actually are you getting any message from matlab window ?

Özgür