ny = ny2/2;
  y_par = [];
  MTT_input = u;
  [MTT_input_last,m] = size(u);

  for i=index
    MTT_input_index = 0;
    p = par;
    p(i) = 1;
    p = par;           # Reset parameters
    p(i) = 1;          # Set sensitivity index to 1
    [mtt_data] = ${sys}_ode2odes(x0,p,simpar);
    if (i==index(1))
      y = mtt_data(:,2:1+ny);
    endif
    y_par = [y_par, mtt_data(:,2+ny:1+2*ny)];
  endfor
endfunction