Dear;

This is realized through the option Simulation parameters in the menu Simulation and choosing Advanced, inline parameters and click in Configure. Then specify the variable as Global parameter.

Thank you Wasim Soliman. I will surely try with this.

try this

function [sys,x0,str,ts]=Crane(t,x,u,flag)

global mp mr mc K1 K2 K3 mu1 mu2 g

mp=1;

mr=1;

mc=14;

g=9.81;

K1=350;

K2=375;

K3=416;

mu1=mp/mc;

mu2=mp/(mc+mr);