Dynare forums

hi,

i try to replicate the paper of robert kollmann (http://www.robertkollmann.com/KOLLMANN_ ... F_2005.pdf). i attached my mod-file. if i run this file the following error code is coming:
Warning: Matrix is singular to working precision.
> In resol at 116
In stoch_simul at 66
In calvo_2oe_kollmann at 425
In dynare at 120
??? Error using ==> print_info at 36
MJDGGES returns the following error code: 23

Error in ==> stoch_simul at 71
print_info(info, options_.noprint);

Error in ==> calvo_2oe_kollmann at 425
info = stoch_simul(var_list_);

Error in ==> dynare at 120
evalin('base',fname) ;

so, can somebody help me to solve this model? thanks very much (i despair