Ramsey policy example & octave

Dynare help (legacy posts)
#1

Hi,
I am trying to run the wiki example (dynare.org/DynareWiki/Optima … call&rev=7) in dynare 4.0.3 with GNU Octave, version 3.0.3. However I get the following output

Configuring Dynare …
[mex] Generalized QZ.
[mex] Sylvester equation solution.
[mex] Kronecker products.
[mex] Sparse kronecker products.

Starting Dynare …
Starting preprocessing of the model file …
2 equation(s) found
Processing derivation …
Processing Order 1… done
Processing Order 2… done
1 equation(s) found
Processing derivation …
Processing Order 1… done
Processing Order 2… done
Processing outputs …
Preprocessing completed.
Starting Matlab computing …

error: binary operator *' not implemented forstruct’ by scalar' operations error: evaluating binary operator*’ near line 15, column 15
error: evaluating binary operator +' near line 15, column 20 error: evaluating binary operator+’ near line 15, column 39
error: evaluating binary operator +' near line 15, column 61 error: evaluating assignment expression near line 15, column 5 error: called fromramsey_static’ in file C:\Octave2\ramsey_static.m' error: evaluating assignment expression near line 72, column 12 error: evaluating if command near line 69, column 5 error: evaluating if command near line 40, column 3 error: called fromdynare_solve’ in file C:/dynare/4.0.3/matlab\dynare_solve.m' error: evaluating assignment expression near line 83, column 26 error: evaluating if command near line 70, column 5 error: called fromdr1’ in file C:/dynare/4.0.3/matlab\dr1.m' error: evaluating if command near line 98, column 1 error: called fromresol’ in file C:/dynare/4.0.3/matlab\resol.m' error: called fromstoch_simul’ in file C:/dynare/4.0.3/matlab\stoch_simul.m' error: evaluating assignment expression near line 25, column 8 error: called fromramsey_policy’ in file C:/dynare/4.0.3/matlab\ramsey_policy.m' error: near line 100 of fileC:\Octave2\ramsey.m’
error: called from dynare' in fileC:/dynare/4.0.3/matlab\dynare.m’
octave-3.0.3.exe:7>

So if someone has a suggestion how to get through this problem can you please post it!

#2

I can’t reproduce the problem. Maybe you have made a typo while creating the *.mod file near line 15.
If not, please upload your *.mod file.

Best

Michel

#3

Dear Michael,
Thanks for the reply. I am posting the mod file that I still cannot fix. Please, write me whether it is working at your environment.
Best,
Ivan
ramsey.mod (568 Bytes)

#4

The problem was coming from an unfortunate name collision between the Dynare function ramsey_static in the toolbox and the name of the static model for your *.mod file (ramsey.mod) and would have the same effect in Dynare Matlab (with a different error message)

I have renamed the Dynare functions
ramsey_static -> dyn_ramsey_static_.m
ramsey_dynamic -> dyn_ramsey_dynamic_.m
in order to avoid such problems.
This is available in the snapshot.

Thank you for reporting the bug

Michel

#5

FYI:
I met similar problem with the example naming it ‘ramsey_policy.dyn’ (on Dynare 4.0.3 / Matlab)
After renaming the file to ‘rpol.dyn’ the error was the same. But I noticed that dynare still reports error in old file (ramsey_policy.m).
I deleted all the related files and cleared memory, it solved the problem.

Regards,
Oleg