ahmad alanaqreh

Thank you so much Maliheh, now it is working in a proper way 

Sorry Jaromil, your suggestion is not clear for me, terminating the MP model will terminate the callback which is not what I want, do you mean terminating the DSP model where I am trying to change ...

In my case x[i, j] and z are parameters(alpha, beta, omega, and lamda are variables), actually, these are the values changing every time, so I am changing my objective function based on the new val...