how can i fixe error Invalid Simulink object name: i_v_flux_o​f_memristo​r/Sine_wav​e in this code.

 v_0=1;
bias=0;
omega=1; % frequency (rad/s)
phase=0;
Nuy=-1;
Muy_D=1e-14;
R_OFF=16e+3; % resistance of undoped region
R_ON=100;
D = 10e-9; % Width of Memristor
w_0 = 5e-009; % Width of doped region 
 
f1=figure(1);
hold on;
grid on;
f2=figure(2);
set(0,'CurrentFigure',2)
hold on;
grid on;
for omega=1:5
        comm=sprintf('set_param(''i_v_flux_of_memristor/Sine_wave'',''Amplitude'',''%.30f'')',v_0); % Amplitude
                        eval(comm);
        comm=sprintf('set_param(''i_v_flux_of_memristor/Sine_wave'',''bias'',''%.30f'')',bias); % bias
                        eval(comm);
        comm=sprintf('set_param(''i_v_flux_of_memristor/Sine_wave'',''Frequency'',''%.30f'')',omega); % Frequency
                        eval(comm);
        comm=sprintf('set_param(''i_v_flux_of_memristor/Sine_wave'',''phase'',''%.30f'')',phase); % Phase
                        eval(comm);
       
             
         % Other parameters of equation (7) in the page 665 of [2]
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/Nuy'',''value'',''%.30f'')',Nuy); % Nuy
                        eval(comm);     
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/Muy_D'',''value'',''%.30f'')',Muy_D); % Muy_D
                        eval(comm);  
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/R_OFF'',''value'',''%.30f'')',R_OFF); % Resistance of undoped
                        eval(comm);                
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/R_ON'',''value'',''%.30f'')',R_ON); % Resistance of doped
                        eval(comm);
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/D'',''value'',''%.30f'')',D); % Width of Memristor
                        eval(comm);   
         comm=sprintf('set_param(''i_v_flux_of_memristor/i_v_flux/w_0'',''value'',''%.30f'')',w_0); % Width of doped region
                        eval(comm);   
         sim('i_v_flux_of_memristor');        
         disp('-----------------------------------------Results-----------------------------------------');
        t_0=D*D/Muy_D/v_0;
         comm=sprintf('disp(''t_0=D^2/Muy_D/v_0 = %e'')',t_0); % Time that the dopants need to travel distance D under constant voltage v_0, chosen app. 1ms
                        eval(comm);   
        comm=sprintf('disp(''Omega_0=2*pi/t_0 = %e'')',2*pi/t_0); % Frequency scales for memristor circuit, chosen typically as given in [1]
                        eval(comm);  
        comm=sprintf('disp(''Q_0 = %e'')',Q_0); % 
                        eval(comm);
        qmax = Q_0*(1-w_0/D);
        comm=sprintf('disp(''q_max(t) = Q_0(1-w_0/D) = %e'')',qmax);
                        eval(comm);  
% plot of v-i 
        set(0,'CurrentFigure',1)
        f1=plot(v,i);
        set(0,'CurrentFigure',2)
        f2=plot(flux,q);
end