Why the code in Chapter 6 of User Guide does not work?

[ecyng]

When I run the code in Chapter 6 of User Guide (fs2000ns.mod), I got the following error:

??? Error using ==> chol
Matrix must be positive definite.

Error in ==> metropolis_hastings_initialization at 52
d = chol(vv);

Error in ==> random_walk_metropolis_hastings at 43
[ ix2, ilogpo2, ModelName, MhDirectoryName, fblck, fline, npar, nblck, nruns,
NewFile, MAX_nruns, d ] = ...

Error in ==> dynare_estimation_1 at 1057
feval(options_.posterior_sampling_method,'DsgeLikelihood',options_.proposal_distribution,xparam1,invhess,bounds,gend,data,...

Error in ==> dynare_estimation at 62
dynare_estimation_1(var_list,varargin{:});

Error in ==> fs2000ns at 175
dynare_estimation(var_list_);

Error in ==> dynare at 132
evalin('base',fname) ;

I use the original codes from the User Guide. Please advise how to fix it.

Thanks,
Eric

[StephaneAdjemian]

Look at this thread.
Stéphane.