Unrecognized function or variable 'perfect_foresight_problem'

Perfect foresight simulations
1

Hi, I try to solve this model by the perfect foresight path for deterministic shocks. But keep getting this error:

Unrecognized function or variable ‘perfect_foresight_problem’.

I even reinstall Dynare 6.2 in my Matlab but still doesn’t work.

Here I also attached my code. Could you please tell me where I am wrong?

Really thank you!
PS2.mod (1.3 KB)

2

I can run your code without issues. There must be something wrong with your installation. Can you provide the full output of the error message.

3

Sure! Here it is!


Unrecognized function or variable 'perfect_foresight_problem'.

Error in sim1 (line 70)
    [res, A] = perfect_foresight_problem(y, y0, yT, exogenousvariables, M_.params, steadystate, periods, M_, options_);

Error in perfect_foresight_solver_core (line 103)
                    [y, success, maxerror, iter] = sim1(y, exo_simul, steady_state, M_, options_);

Error in perfect_foresight_solver>homotopy_loop (line 357)
        [endo_simul, success, maxerror, solver_iter, per_block_status] = perfect_foresight_solver_core(endo_simul, exo_simul, steady_state, exo_steady_state, M_, options_);

Error in perfect_foresight_solver (line 153)
[completed_share, endo_simul, exo_simul, steady_state, exo_steady_state, iteration, maxerror, solver_iter, per_block_status] = homotopy_loop(M_,options_,oo_,options_.simul.homotopy_max_completion_share, shareorig, endoorig, exoorig, endobase, exobase, initperiods, simperiods, lastperiods, recompute_final_steady_state, oo_.steady_state, oo_.exo_steady_state);

Error in PS2.driver (line 363)
[oo_, Simulated_time_series] = perfect_foresight_solver(M_, options_, oo_);

Error in dynare (line 308)
    evalin('base',[fname '.driver']);
4

That looks like the mex-files are missing. What is your OS? What is the content of the dynare/mex/matlab subfolder?

5

I am using macOS 13.4.1, Matlab R2023a + Dynare 6.2, both in Arm64. Here is the content I find at dynare/mex/matlab:

截屏2024-12-10 08.16.32
截屏2024-12-10 08.16.32754×1084 113 KB

6

@wmutschl Do you maybe know what is going on?

7

Hi, I just tried Dynare in x86 and suddenly it works. I guess I must remember the wrong version of my Matlab and since everything runs well in stochastic situation I didn’t find this problem before. Sorry for the disturbance and thank you so much for your help!

8

Hi, @jpfeifer
I’m experiencing the same issue as Hegema regarding the “Unrecognized function or variable ‘perfect_foresight_problem’” error.

Whenever I try to solve a perfect foresight problem for a deterministic model, I encounter the exact same error message. Additionally, the full error output is identical to the one Hegema shared earlier.

I attempted to use the same file (PS2.mod) and followed the suggested solution of re-downloading Dynare for the x86. However, the issue persists for me.

I’m using macOS 15 + Matlab R2024a + Dynare 6.2.

Despite following the suggested steps, the problem remains unresolved. Could anyone suggest alternative methods to address this issue?

Thank you in advance for your help!

9

Hi, my old problem is I did not match the version of Matlab and Dynare at the same time. Once I use them both in X86 version, everything is fine. That’s what I found. Maybe you can try it.

Thank you!

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