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vector selector

vector selector

vector selector

I have some problem with the dsp block vector selector when i use the same version of simulink (VERSION 4) but two different versions of matlab (release 12 and 12.1). I developped a control system by simulink and when i use matlab release 12.1 i haven't any problem. I tried the same application in another pc with malab release 12 and the same version of simulink but when i started the simulation some vector selector block gave me some problem; but when i  before changed some parameter of all vector selector blocks and after rechanged at the same values the parameters of all vector selectors block the simulation started to work well!! I developped a ring closed control system, that it works very well with the matlab 12.1, but with the other pc with matlab 12 one block vector selector give me a problem.But If i open the ring and i fed with a constant value the block made with vector selector blocks then the simulation works well. Then i have the problem when i close the ring!! I have developped the control system with simulink 4 and matlab 12.1 eand tried it in the other pc (matlab 12 where i use the dsp) and  i thought it was a problem of compatibility between the versions.Then i made the same control system with simulink 4 in the pc where there is matlab 12 but i couldn't solve the problem. The simulation doesn't work when i close the ring. WHY??
Could you help me??

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