Dynare forums

hi friends,
When I run my model, appear this error:

Error using print_info (line 42)
Blanchard Kahn conditions are not satisfied: no stable
equilibrium

Error in stoch_simul (line 85)
print_info(info, options_.noprint, options_);

Error in z (line 421)
info = stoch_simul(var_list_);

Error in dynare (line 162)
evalin('base',fname) ;

what's my mistake? Thanks