how to define iteration region by simulink?

Hi every body,

I'm trying to rebuild a modell in Simulink which is already done as a MATLAB code. In a specific part of this model an Iteration should be done by a value in Matrix form. By the exact same code and same initial conditions the answer of the Iteration by MATLAB Program is for each element of matrix i.e. between 1 and -1 but by the model in simulink I have a result between 0 and 2. Actually the correct answer is what is done by MATLAB program. How can i define the right region in simulink to have a correct answer by the iteration?

tnx