Possible bug in version 4.2.4

Dear Dynare team,

I just wanted to let you know about a possible bug I stumbled upon while trying to run a code on the latest version of Dynare. The code in question runs very well in previous versions of this software. However, I got the following error message when I tried to run it on version 4.2.4:

??? Error using ==> dynare_solve at 42
You can’t use solve_algo=0 since you don’t have MATLAB’s Optimization Toolbox

I guess it would be good for you to check whether there is any incompatibility with MATLAB’s Optimization Toolbox.

In appreciation of your time and attention,


Hi, this is a bug in the way we were testing for the existence of a license in Matlab. It has been fixed in the unstable branch on Dec 19. To fix it, you can replace lines 41-43 of dynare_solve.m with the code below. Similar fixes were applied in solve_one_boundary.m and dynare_config.m.

    if ~exist('OCTAVE_VERSION')
        [has_optimization_toolbox junk] = license('checkout','optimization_toolbox');
        if ~has_optimization_toolbox
            error('You can''t use solve_algo=0 since you don''t have MATLAB''s Optimization Toolbox')

Hi, thanks for the patch, I applied it to dynare_solve.m:41-43 and I get the following error in Matlab 7.9.0:

[quote]??? Error using ==> license
Too many output arguments.

Error in ==> dynare_solve at 42
[has_optimization_toolbox junk] = license(‘checkout’,‘optimization_toolbox’);

Error in ==> dynare_solve_block_or_bytecode at 66
[x, check] = dynare_solve(‘bytecode_steadystate’, …

Error in ==> steady_ at 126
[oo_.steady_state,check] = dynare_solve_block_or_bytecode(oo_.steady_state,…

Error in ==> steady at 54

Error in ==> dsge4_dynare at 259

Error in ==> dynare at 120
evalin(‘base’,fname) ;[/quote]


Yes, there is a problem with the previous solution because it’s only valid for Matlab version >= 2011a. A solution that works for all Matlab versions >= 7.0 is as follows:

In dynare_solve.m, enter:

Then, add a file called user_has_matlab_license.m with the following code:

function [hasLicense] = user_has_matlab_license(toolbox)
%[hasLicense] = user_has_matlab_license(toolbox)
% checks for license using the appropriate function call
%   toolbox: string for toolbox name
%   hasLicense: bool indicating whether or not the user has the license
%   none

% Copyright (C) 2012 Dynare Team
% This file is part of Dynare.
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% GNU General Public License for more details.
% You should have received a copy of the GNU General Public License
% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.

if matlab_ver_less_than('7.12')
    hasLicense = license('test', toolbox);
    [hasLicense ~] = license('checkout',toolbox);

Similar changes need to be made to dynare_config.m and solve_one_boundary.m. If you are comfortable with git, you can see the changes on the 4.2 branch in commit 5a580341337e51fcf17a4a877201a3bbf0be59d4