How to solve this issue

https://picasaweb.google.com/100600576001599595108/MATLABSimulink#5834654212202423442

I have attached a simulink model and controlling code,,,

please tell me how to keep the old values of 'b',,,

open_system('C:\Documents and Settings\admin\Desktop\test_Final.slx')
b=1;
for i=1:1:100;
   set_param('test_Final','StopTime', sprintf('%d',i));
   simout= sim('C:\Documents and Settings\admin\Desktop\test_Final.slx');
    pause(1)
        if i==6;
            b=10;
        end

end

[Walter Roberson]

"sorry that page is not found"

[Walter Roberson]

what "old value of b" ?

[Arun Badigannavar]

I have sent u a mail with attached simulink model,,please,,if you have time try it,,Mr walter

[Arun Badigannavar]

Mr Walter ...could u please tell me which block to use for feedback ,,,i mean it should take value and give it,,,something like 'memory block'

[Arun Badigannavar]

https://picasaweb.google.com/100600576001599595108/MATLABSimulink#5834654212202423442

[Walter Roberson]

"sorry that page is not found" still.

Please do not email me simulink models, as I do not have Simulink.

[Arun Badigannavar]

no worries,,i have sent u mail of a scrrenshot,,,not sent any model,,,

[Daniel Shub]

Please do not contact people directly, unless they request it. Your question is clearly lacking some details. Please edit the question and reopen.