Assistance to run code

I am trying to run this code, but the following message appears:

dynare Untitled.mod

Configuring Dynare ...

[mex] Generalized QZ.

[mex] Sylvester equation solution.

[mex] Kronecker products.

[mex] Sparse kronecker products.

[mex] Local state space iteration (second order).

[mex] Bytecode evaluation.

[mex] k-order perturbation solver.

[mex] k-order solution simulation.

[mex] Quasi Monte-Carlo sequence (Sobol).

[mex] Markov Switching SBVAR.

Using 64-bit preprocessor

Starting Dynare (version 4.5.7).

Starting preprocessing of the model file ...

Found 37 equation(s).

Evaluating expressions...done

Computing static model derivatives:

- order 1

Computing dynamic model derivatives:

- order 1

Processing outputs ...

done

Preprocessing completed.

Reference to non-existent field 'lb'.

Error in dynare_solve (line 209)

[x,fval,exitflag] = lmmcp(func,x,olmmcp.lb,olmmcp.ub,olmmcp,varargin{:});

Error in evaluate_steady_state (line 223)

[ys,check] = dynare_solve(@static_problem,...

Error in steady_ (line 55)

[steady_state,params,info] =

evaluate_steady_state(oo_.steady_state,M_,options_,oo_,~options_.steadystate.nocheck);

Error in steady (line 81)

[steady_state,M_.params,info] = steady_(M_,options_,oo_);

Error in Untitled (line 474)

steady;

Error in dynare (line 235)

evalin('base',fname) ;

[Image Analyst]

Attach your m-file with the paper clip icon, along with any data files needed to run it.

https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Also, tags are short words that describe your situation, like Monte-Carlo or whatever. Do not paste a whole program into the tag field.

[John D'Errico]

Please don't put your code into the tag field. I've deleted those tags, since they are not tags.