MATLAB minreal for stabilizing a control plan

Having weighing matrices G and Rin using lqry

      [K,~,~] = lqry(mysys,G,Rin);

I got the following error:

      Error using ss/lqry (line 96)   The "lqry" command failed to stabilize the plant or find an optimal feedback gain. To remedy this problem:
      1. Make sure that all unstable poles of A are controllable through B (use MINREAL to check)
      2. Modify the weights Q and R to make [C D;0 I]'*[Q N;N' R]*[C D;0 I] positive definite (use EIG to check positivity).

If I want to use minreal for stabilizing the plan, how should I modify G and Rin ?

      mysys=minreal(mysys);
      G=?????
      Rin=?????
      [K,~,~] = lqry(mysys,G,Rin);