parallel computing for simulink model, which used global variable

Hallo all, i wrote a parfor loop, and in the parfor loop a simulink model is called, but this simulink model uses many global variable. And when this model is called, exits a error "Undefined function or variable 'CYCLE'". This CYCLE is a global variable and should be used in Simulink model. Do you have any suggestions? Thanks a lot!

 parfor
   ....
 [f_left, con_left, fflag_left]    = CallObjFcn(Problem,a,b,calltype,varargin{:});
   ....
 end

 function [fcn_value, con_value, feas_flag] = CallObjFcn(Problem,a,b,calltype,varargin)
    load('C:Documents\MATLAB\V1Par - Copy\Simulation_Daten');
    ......
    [fcn_value,feas_flag] = feval(Problem.f,point,varargin{:});
    ......
end

 Problem.f = 'gp_con';

 function [value,fflag] = gp_con(x)
 ......
 sim('XRSimWWPen01');
 ......
 end